Supported platforms and requirements

CodeTwo Exchange Rules Pro is designed to work with two versions of Exchange Servers: 2019 and 2016. There are two main components that need to be installed. Their requirements differ slightly from each other. Study the description and table below to get an overview of supported systems and requirements enabling its smooth and uninterrupted operation. There is no need to install anything on end-users' machines, the software runs server-side.

Exchange Rules Pro Service is a set of services (Transport Agent, Exchange Rules Service, Attendant Service, Sent Items Update Service) responsible for processing rules and settings defined within the Administration Panel and applying them to messages traveling through the Exchange Server.

Administration Panel is the management console of the program used for the configuration of rules and other settings associated with the program's operation. The Administration Panel handles the settings to Exchange Rules Service, which is responsible for processing them.

CodeTwo Exchange Rules Converter is a stand-alone application that can convert email rules and templates form the CodeTwo Exchange Rules product family to CodeTwo Email Signatures 365

Software components
Server side: CodeTwo Exchange Rules Pro Service, installed directly on Exchange Servers.
Administration: CodeTwo Exchange Rules Pro Administration Panel, installed on any workstation or alongside the services directly on Exchange Server.
Rules and templates conversion:  CodeTwo Exchange Rules Converter, installed on any machine in a domain where the CodeTwo Exchange Rules Pro Service is running.
CodeTwo Exchange Rules Pro Service
Required permissions:

Local Administrator rights are necessary to install but Domain Admin permissions are required in some further configuration steps.

By default, the following services run under the LocalSystem account:

  • CodeTwo Exchange Rules Attendant
  • CodeTwo Exchange Rules Sent Items Update
  • CodeTwo Exchange Rules Service

It is possible to run these services under the local user account, but this account needs to have Domain Admin permissions. 


Services can be installed on the following 64-bit systems:

  • Windows Server 2022[1]
  • Windows Server 2019[2]
  • Windows Server 2016

with one of the 64-bit Exchange Server versions below:

  • Exchange 2019 with Mailbox role
  • Exchange 2016 with Mailbox role
.NET Framework 4.5 is required.
The service must remain active at all times and should not be installed on any disk that can be unmounted.
Supported environments:
CodeTwo Exchange Rules Pro Administration Panel
Required permissions: All users can run the Administration Panel (read how to configure access rights and remote management).

The Administration Panel can be installed on the following 64-bit systems:

Windows Server:

  • Windows Server 2022
  • Windows Server 2019
  • Windows Server 2016[3]


  • Windows 11
  • Windows 10

.NET Framework 4.6.2 and Microsoft Edge or Internet Explorer 9 (or later) are required.

CodeTwo Exchange Rules Converter
Required permissions:

The account used to run the application needs to have access to the rules created in the Administration Panel (with at least View rights). If this user’s access is restricted to specific rules, only these rules will be converted. Learn more about the access rights management

The account used to connect to CodeTwo Email Signatures 365 needs to have a mailbox (needs to have a Microsoft 365 / Office 365 license assigned that includes the Exchange Online plan) and needs to be allowed access to the signature management app. Learn how to check or assign the necessary access permissions

  • 64-bit Windows, at least Windows 10 or Windows Server 2016,
  • .NET Framework 4.7.2,
  • Microsoft Edge or Internet Explorer 9 (or later).
Notes and warnings:


  1. ^ Windows Server 2022 works only with Exchange 2019 CU12 and later.
  2. ^ The program can also be installed on the Server Core version of Windows Server. Learn more
  3. ^ When installing on Windows Server 2016, make sure your operating system includes the latest updates. Learn more
Exchange Servers 2007, 2010, and 2013 are no longer supported.
It is impossible to install program components using Group Policy Object (GPO) or other unattended or remote deployment method. The installation has to be performed manually on each machine.
Linked mailboxes are supported; however, Active Directory data such as AD user properties and AD group membership is obtained from the domain controller of the environment in which Exchange Server and the CodeTwo services are installed.
Encrypted and digitally signed emails are processed if the S/MIME or Active Directory Rights Management Services (AD RMS) standard is used. Others, such as PGP or OpenPGP (e.g. GPG), are not yet supported.

Additional requirements for the built-in unsubscribe mechanism:

  • the unsubscribe mechanism supports TLS versions up to 1.2.
  • if your environment uses TLS 1.2 as the only protocol, you need to update the CodeTwo software to the latest version to be able to use the unsubscribe feature (TLS 1.2 is supported in version 2.11.2 and newer).
Size on disk after installation: When both the Administration Panel and the Exchange Rules Pro Service are installed, the installation size on your disk is similar to the size of the installation file (see the Download page for details). Installation of additional components (such as .NET) might be required - these components usually require less than 100 MB of available disk space.

See also

Installation process - this article describes step by step how to install the program in the single and multi-server environments and provides information about the upgrade installation from the previous versions of CodeTwo Exchange Rules Pro.

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