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How to manually install, uninstall or temporarily disable CodeTwo Exchange Rules Transport Agent

...Two Exchange Rules \CodeTwo.ER.Agent.dll" Enable-TransportAgent -Identity "CodeTwo Exchange Rules " If you use CodeTwo Exchange Rules 2013 1.x: Install-TransportAgent -Name "CodeTwoExchangeRules " -TransportAgentFactory "ExchangeRulesAgent ... (ID:176)

Signatures are not added

Problem: Signatures are not added by a program from the CodeTwo Exchange Rules family. Solution: There might be several reasons for such behavior. The most probable causes and adequate solutions are described below. Missing component in a... (ID:551)

An email rule is applied more than once to the same message Fig. 1. The Stop processing next rules option in CodeTwo Email Signatures for Office 365 (top window) and in the Exchange Rules software family (bottom window). If you prefer to have your CodeTwo software configured in such a way tha... (ID:280)

How to fix common image-related problems in signatures

...ired format conversion Default email format and its conversion in email clients Email format conversion/enforcement by Exchange Server Email format conversion by CodeTwo and other third-party software Images in signatures are not correctly... (ID:467)

Agent installation problems

Problem: CodeTwo Transport Agent cannot be implemented when installing CodeTwo Exchange Rules Pro 2 or CodeTwo Exchange Rules Family. Solution: There may be two possible reasons and solutions to this problem: You may be affected by a bu... (ID:441)

External email addresses are treated as internal senders only, you can achieve this by excluding internal senders. Guidelines for users of older versions of CodeTwo Exchange Rules (Pro) If you use an older version of CodeTwo software, the available options might look slightly differen... (ID:292)

How to prevent Outlook from removing extra line breaks from emails and email signatures


Sent Items Update troubleshooting

Problem: The Sent Items Update service (SIU) in CodeTwo Exchange Rules family software, including CodeTwo Exchange Rules Pro 2.x, cannot properly connect with Exchange Web Services (EWS). As a result, signatures are not being included in... (ID:383)

A signature is inserted in a wrong place in a message the signature template editor. To learn how to do that, see: this manual - if you use software from the CodeTwo Exchange Rules family this manual - if you use CodeTwo Email Signatures for Office 365. If the setting in the editor a... (ID:195)

How to fix problems with importing CodeTwo Exchange Rules settings the structure of this configuration file is changed. This is what happened, for example, with the release of CodeTwo Exchange Rules Pro version 2.6 (and the corresponding Exchange Rules Family products) which introduced improved Access R... (ID:561)

Troubleshooting problems with connection to Exchange Rules services

Problem: The Administration Panel is not able to connect to the Exchange Rules Service, and you get various errors. Solution: Use the links below to learn about the most common problems and how to solve them. Connection to the Exchange Ru... (ID:785)

How to check if CodeTwo Exchange Rules Engine service is published in ADSI Edit

Problem: You need to check if the CodeTwo Exchange Rules Service is registered in ADSI Edit. This might be useful when troubleshooting some very specific issues in CodeTwo Exchange Rules Pro and CodeTwo Exchange Rules family software. Sol... (ID:452)

Messages from Apple devices and mobile devices are sent in plain text

...e HTML signatures added to Apple devices and mobile devices, you can force email format conversion: If you use CodeTwo Exchange Rules Pro, you can use the Force email format action or force an email format directly on your Exchange Serv... (ID:438)

The Server Monitor is not working about the most common problems and recommended solutions. Servers are not listed due to security settings CodeTwo Exchange Rules services are not registered in ADSI Edit Servers are not listed due to security settings If your Exchang... (ID:807)

Incorrect address or SOAP action

Problem: The CodeTwo Exchange Rules Service (of CodeTwo Exchange Rules Pro or CodeTwo Exchange Rules ) does not start. An error window might appear (Fig. 1.), with the following message: There was no endpoint listening at http://localhost... (ID:428)

Diagnosing CodeTwo Exchange Rules family software (newer versions)

Problem: CodeTwo assistance is required with your CodeTwo Exchange Rules family software problems or advanced configuration. Solution: Follow the steps below to collect all diagnostics: This Knowledge Base article is designed to use with la... (ID:479)

How to avoid proxy-related issues when using the Sent Items Update service

...failed. The remote server returned an error: (407) Proxy Authentication Required. Fig. 1. The error visible in CodeTwo Exchange Rules Pro 2. Solution Firstly, please check if the account used for Sent Items Update service is allowed to go... (ID:470)

Good practices for preparing an email signature

...low the links below to learn how to convert signature templates in: CodeTwo Email Signatures for Office 365, CodeTwo Exchange Rules family of products. Use tables with separate cells for different elements, e.g. images, text, or placeh... (ID:488)

Troubleshooting problems with emails and email signatures on mobile devices

...the default behavior in all recent versions of the iOS operating system. Luckily, if you use software from the CodeTwo Exchange Rules family, you can bring these pictures back via a dedicated action: Restore images removed by iPhone and iP... (ID:683)

How to troubleshoot a problem with access rights to rules (error 1301)

...sue, you need to make sure that all required updates (including Service Packs) are installed on all servers hosting the Exchange Rules services.... (ID:382)

Spoofed emails receive signatures in the CodeTwo Exchange Rules family of products

...mpt to impersonate a user inside your organization. As a result of this spoofing attempt, they are processed by CodeTwo Exchange Rules and receive signatures and/or disclaimers identically to authentic emails. Solution: The problem occurs b... (ID:891)

Signatures are not visible in emails in the Sent Items folder on mobile devices

...running in cached mode or its folders may not be updated fast enough. CodeTwo Sent Items Update service uses native Exchange Web Services (EWS) API calls to update messages directly in the Exchange Server mailboxes. That is why we ne... (ID:505)

You are not able to resend a message updated by SIU

Problem: You cannot use a resend option for a message processed by the Sent Items Update service (SIU) of CodeTwo Exchange Rules PRO or CodeTwo Exchange Rules  family software. The attempt to resend the e-mail ends with the following error... (ID:423)

Error related to deserializing object graph some scenarios, especially when you are trying to: Import rules configuration file of a very large size in CodeTwo Exchange Rules and CodeTwo Exchange Rules Pro Error: The formatter threw an exception while trying to deserialize the m... (ID:498)

CodeTwo Exchange Rules software failed to save licensing data

Problem: Due to insufficient user rights, CodeTwo Exchange Rules software cannot activate your license. During the activation, the application tries to save some important data to your disk, but returns an error, as it does not have permiss... (ID:435)

How to extend the timeout for services if they fail to start or stop

...Properties. On the General tab, change the Startup type to Automatic (Delayed Start), as shown in Fig. 2. for CodeTwo Exchange Sync. Fig. 2. Selecting the startup type of a service. How to increase the timeout value for the service sta... (ID:228)

Installation process

CodeTwo Exchange Rules is designed for adding signatures to emails sent from mailboxes hosted on Microsoft Exchange Servers 2007, 2010, 2013 , 2016 or 2019. If you are looking for signatures/disclaimer management tool for Exchange Server...

Supported platforms and requirements Server 2016, make sure your operating system includes the latest updates. Learn more ^ SP1 is required for CodeTwo Exchange Rules 2013 /2016/2019 only. ^ SP2 is required for CodeTwo Exchange Rules 2013 /2016/2019 only.  It is impo...

Managing access rights

...Management feature that allows you to customize software's permissions. This feature is disabled by default in CodeTwo Exchange Rules , however, you can easily find it in the top menu bar (Fig. 1.) and enable by checking Switch on Access Ri...

How to update or upgrade and what is the difference

...we release a new version with planned improvements (this usually happens every quarter, see version history of CodeTwo Exchange Rules 2019, 2016, 2013 , 2010 or 2007). [maintenance] - the digit in the third position will change only when t...


...are sold in the license packs. More information on licensing can be found on the pricing site of each product from the Exchange Rules family. Do I have to renew the license annually? No. Licenses for the software are perpetual. This means...

Hints to getting started

This section describes how to get started with CodeTwo Exchange Rules  by providing hints associated with the program's installation, settings, and configuration. Installation Install the Exchange Rules  Service on Exchange Server equi...


CodeTwo Exchange Rules is a mail processing solution for Microsoft Exchange that enables centralized management of signatures in a wide variety of environments: from Exchange 2007 via 2010, 2013 , and 2016 to 2019. Unlike the Hub Transport o...


...opinion on CodeTwo Exchange Rules 2019 Share your opinion on CodeTwo Exchange Rules 2016 Share your opinion on CodeTwo Exchange Rules 2013 Share your opinion on CodeTwo Exchange Rules 2010 Share your opinion on CodeTwo Exchange Rules 2007...

Program's architecture

CodeTwo Exchange Rules  is a program used for adding footers to messages traveling through the Exchange Server. Its architecture is based on two components responsible for the creation of email rules and their processing: Exchange Rules ...

Hybrid environments

CodeTwo Exchange Rules supports installation in hybrid environments with Exchange Server on-premises and Exchange Online (Office 365). Successful deployment of the software in hybrid environments relies on proper mail flow configuration by...


...Checkbox not marked. Primary SMTP email address only Each Alias Exception: rule is not triggered in the case of Exchange 2013 , if sender of a message is external Addresses defined in the list of addresses field: Particular alter...


CodeTwo Exchange Rules is designed to work with five versions of on-premises Exchange Servers: 2007, 2010, 2013 , 2016, and 2019 as well as with hybrid environments (Exchange Server on-premises tied with Exchange Online / Office 365). If yo...

New email signature manager for Exchange 2019 + CodeTwo Exchange Rules product family update

Our CodeTwo Exchange Rules family of products has been expanded with a new solution designed for Exchange Server 2019 – CodeTwo Exchange Rules 2019. The program allows you design and deploy email signatures and disclaimers centrally, for each user or group of users in your organization. Plus, it comes with a ton of features that [...]

Update to CodeTwo Exchange Rules released

We would like to let you know that we have released new updates to our email signature managers for on-premises Exchange – CodeTwo Exchange Rules and CodeTwo Exchange Rules Pro. The newest version brings some minor UI improvements and makes it possible to see images embedded in email signatures on Outlook on the web in [...]

Update to CodeTwo Exchange Rules and CodeTwo Exchange Rules Pro – new features!

CodeTwo Exchange Rules and CodeTwo Exchange Rules Pro, our email signature management tools for on-premises Exchange Server, have been updated. Apart from a bunch of improvements and fixes, this update brings two new features which facilitate adding tracking parameters to hyperlinks and inserting HTML snippet code to signature templates. Easily add tracking parameters to hyperlinks [...]

Update to CodeTwo Exchange Rules: Improved access rights management

We've just released an update to CodeTwo Exchange Rules 2016, 2013, 2010, 2007 and CodeTwo Exchange Rules Pro – our email signature (and, in the case of CodeTwo Exchange Rules Pro, email content and flow) management applications for Microsoft Exchange. The update brings several major improvements in areas such as remote configuration of email rules, [...]

Updates to CodeTwo Exchange Rules 2013, 2010, 2007 and Pro available now!

Our email signature and disclaimer management tools have been just updated. The newest versions bring some major bug fixes as well as significant improvements to the built-in Rules Tester and the editor. Additionally, we’re excited to announce that CodeTwo Exchange Rules Pro is now compatible with Exchange 2016! NOTE: A standard version of CodeTwo Exchange [...]

CodeTwo Exchange Rules adds Office 365 hybrid compatibility

Our email signature management tools for Microsoft Exchange, the family of CodeTwo Exchange Rules and CodeTwo Exchange Rules Pro products, have just been equipped with a feature that admins of hybrid environments (Office 365 with Exchange on-premises) will find very helpful. Starting with the latest release, CodeTwo Exchange Rules programs can be easily deployed in [...]

Updates to CodeTwo Exchange Rules 2013, 2010, 2007 and Pro released!

We have just released updates to 3 applications from our CodeTwo Exchange Rules product family and CodeTwo Exchange Rules Pro. The current release brings a number of fixes and significant improvements to our email signatures and disclaimiers management software for Exchange Server. The most important changes include: the brand new HTML template editor engine and the new Social [...]

Updated CodeTwo Exchange Rules 2013, 2010, 2007 released!

We have just released new updates to our email signature management software for Exchange 2007, 2010 and 2013. These updates are equal for all three products from the CodeTwo Exchange Rules family and contain a number of fixes and new features. What's new: Encrypted and digitally signed messages can now be processed by the program. [...]

What’s new in the latest versions of CodeTwo Exchange Rules Family software?

We have just released new versions of programs from the CodeTwo Exchange Rules Family line. Our dev team included a ton of upgrades and total overhauls within the software. Check the following article to learn more and prepare to be excited! We have improved CodeTwo Exchange Rules to bring its functionality to the next level, [...]

CodeTwo Exchange Rules Pro and CodeTwo Exchange Rules Family Update Release

We have just released an update of CodeTwo Exchange Rules PRO and CodeTwo Exchange Rules 2013, 2010 and 2007. The latest version of the application solves the problem with adding disclaimers to emails sent from OWA after updating Internet Explorer to version 11, resulting from the new browser file format MSHTML11 . We recommend that [...]

CodeTwo Exchange Rules 2013, 2010, 2007 – update release

We have just released new updates for products from the Exchange Rules family (email signature managers for Exchange 2007, 2010 and 2013). The updates are identical for all products from the family and contain 2 new features and 3 fixes, all of which were suggested or reported by our users – thank you and keep [...]

CodeTwo Exchange Rules 2013/2010/2007 – minor update

Our central signature management products for Exchange Server – CodeTwo Exchange Rules – have recently been updated. The updates contain 3 fixes for minor issues reported by users – thank you for your feedback! The 3 issues were: Editor: Copy/cut/paste options did not work for the selected text in RTF format. Fixes in the image [...]

10 things to check when creating email signatures on Exchange Server

The story often goes like this: one day an Exchange administrator gets a phone call from his boss and hears … “We have a problem – signatures in the company’s emails are a mess: some users have incorrect data, formatting is inconsistent, the company’s logo is not there, and above all, legal disclaimers on Exchange are missing. [...]

CodeTwo Exchange Rules 2007 and 2010 – support for Outlook 2013!

We have just released an update to CodeTwo Exchange Rules 2007 and CodeTwo Exchange Rules 2010, our signatures and disclaimers management tools for Microsoft Exchange admins. The programs are now fully compatible with Microsoft Outlook 2013 mail. As usual, we advise all users to install the latest version. The update is free of charge for [...]

Email Disclaimers

Probably everyone who uses email has already had a chance to see these mysterious faded lines attached to corporate messages. Email disclaimers are invaluable for businesses in these days when taking someone to court for no reason happens on a daily basis. No matter if you're negotiating a big business deal or buying a watch [...]

Blocking basic authentication in Office 365 (Microsoft 365)

The article was updated on February 25, 2021 Due to the Covid-19 pandemic, there was a huge change of plans concerning disabling basic authentication in Microsoft 365 (for connections to Exchange Online). The complete shutdown has been postponed indefinitely. While it gives organizations much more time to prepare, it’s a good idea to get tenants [...]

How to block external access to Exchange admin center in Exchange 2019 via Client Access Rules?

[Update]: This post was updated on May 08, 2020. One of the most interesting security options in Exchange 2019 is the Client Access Rules feature. It allows the administrator to define rules to block or limit access to EAC (former ECP) and to EMS (Exchange Management Shell). This functionality was not present in previous versions of [...]

What’s new in Exchange 2019?

It has become a sort of a tradition to use the admin’s blog for informing you on what’s new in the newest Exchange Server version. Now, it is time to answer the question: What is new in Exchange 2019? Judging from the Exchange Server 2019 Now Available post, you could assume that Exchange 2019 does [...]

How to set up server-side email signatures on Exchange Server 2019

Exchange Server 2019 offers a way to configure a global or server-side email signature. Although it is more often referred to as “disclaimer” feature, it is often used to configure automatic HTML signatures. Why is this better than email signatures set up by users? By applying organization-wide email signatures on Exchange Server 2019, you can [...]

How to set up different email signatures for a shared mailbox and user mailbox in Office 365?

There are three options to choose from to add different signatures to user mailbox and shared mailbox emails. The first method is to create two separate signatures in Outlook, the second requires mail flow rules on the server side and the third involves the use of CodeTwo Email Signatures for Office 365. It is a [...]

Message tracking logs in Exchange Server

Possible uses for message tracking logs Message tracking logs location and structure Configure message tracking What is in the message tracking logs Using the Get-MessageTrackingLog cmdlet Message tracking logs are a valuable source of information for any Exchange admin. While Office 365 has its message tracing, which works just fine, on-premises Exchange stores much more [...]

Exchange 2016 and SharePoint 2016 integration (part 2) – calendar overlay & site mailbox

In the previous article about Exchange vs SharePoint integration, I have explained how to configure email alerts and an email-enabled library. The first part of the article also contains information about the test environment I use. This article is dedicated to calendar overlay and creating a site mailbox with an email-enabled library. As a quick [...]

Office 365 litigation hold vs retention policy – what’s the difference

[Update] This post was updated on October 18, 2017. Office 365 and on-premises Exchange offer some native means of protection against losing precious data. Lately, a lot of changes have been introduced in the Exchange Security & Compliance Center. A retention policy and a litigation hold can be used to add a layer of protection against [...]

Setting an auto reply for a shared mailbox

[Update] This post was updated on January 30, 2018 To configure a professional auto-response (not an Exchange Out Of Office message, which is sent only once per sender) for a shared mailbox, apply one of those solutions: Set an auto reply for a shared mailbox in Outlook Set an auto reply for a shared mailbox with the CodeTwo [...]

Setting an auto reply for a distribution group

First, let’s get one thing out of the way – distribution groups cannot send automatic responses by themselves. Using Reject the message with the explanation / enhanced status code transport rule actions to send auto-replies for a distribution group is not a good idea either. Firstly, because it defeats the whole purpose of maintaining a [...]

Exchange/Office 365 Hybrid Configuration Wizard – step by step guide

Deploying a hybrid environment is one of the most complicated tasks a system administrator faces during migration to Office 365. It might take weeks of collecting data about the infrastructure, reading publications, planning migration stages and testing. What is more, even with all this effort, there is no guarantee that everything will turn out just [...]

How to block sending out-of-office messages on Exchange Server for external recipients?

Sometimes you may need to prevent auto-reply messages from being sent to people outside of your organization. No matter what the reason is for such a setting, you can quickly block out-of-office messages (OOF) directly on the Exchange Server. This way you can ensure that all users in your organization have the out-of-office messages blocked [...]

Email disclaimers on Microsoft Exchange Server’s side

(First published Jan 16, 2014) Server sided email disclaimers belong to one of the most desired features among server administrators. Although the need for this functionality has been consistently increasing throughout the past years, Microsoft still hasn’t disclosed a robust built-in Exchange Server mechanism that would fully satisfy the needs of IT professionals. Let’s take [...]

How to save outgoing email attachments in SharePoint library?

CodeTwo Exchange Rules Pro is the ultimate powerhouse tool in the hands of an Exchange administrator. On a very general level it lets you create rules that redefine email flow and modify email content in your organization. A common example of the program’s application is extended control over server-level email signatures. There are, however, numerous [...]

Exchange 2013 components inactive

Installing a new Cumulative Update (CU) on the Exchange Server is always somehow stressful. If something goes wrong, you may be left with a corrupted/not working Exchange Server what means a financial loss to your company. To prevent this scenario from happening, make sure you always create an up-to-date backup copy before starting the CU installation [...]

The differences between Exchange 2016 and Exchange 2013

It’s been a while since Exchange 2016 was published and some of you probably are long after the first impressions and experiences in working with the newest release. Those of you, who haven’t had this pleasure yet, need to know that moving to Exchange 2016 doesn’t have this offbeat taste and Exchange 2013 users should [...]

How to track attachments in Exchange 2013/2016/2019

[Update]: This post was updated on April 18, 2017. One of the security issues that are troubling system administrators these days is to keep track of email attachments that were sent and received in the organization. Since files attached in emails might contain malicious software, sensitive information or just simply grow the email database size [...]

Email rules on Exchange Server explained

Email traffic increases steadily each year. In 2012, users were sending 144 billion messages a day, while in 2014 this number reached 191.4 billion. According to the Radicati report the volume of sent emails will hit the 201 billion mark in 2015. With such a big volume of data, it is quite a challenge to [...]

How to manage users’ photos in Microsoft Lync, Outlook and Exchange Server?

Starting with the 2010 edition of Outlook, Lync and Exchange users are finally able to have their photos displayed directly in Outlook and Lync clients in conversations. This new feature, although extremely helpful for users, brought new challenges from the infrastructure and administration point of view. We probably all know these blurry images appearing in Lync [...]

Email forwarding on Exchange Server 2013/2016/2019

[Update]: This blog post was updated on March 18, 2019. Some organizations may require to automatically forward emails or send a copy of a message to other mailbox on Exchange. The reasons may be different ranging from auditing purposes, data leak protection (DLP), availability, etc. In other words, there are cases when emails from certain [...]