CodeTwo Outlook Add-ins overview

CodeTwo Email Signatures 365 lets you add signatures in the cloud (server-side), after emails are sent, directly in Outlook (client-side), as users compose their emails, or both. CodeTwo Outlook signatures are added by a dedicated add-in that can be deployed organization-wide. There are two add-ins that you can use:

  • Modern CodeTwo Signatures Web Add-in for Outlook & OWA that works with Outlook for Windows, Outlook for Mac and Outlook on the web (OWA). This modern Web Add-in offers better experience and more capabilities. It can also be used to preview cloud signatures
  • Legacy CodeTwo Signatures Add-in for Outlook (COM Add-in) that works with Outlook for Windows only.

You can only use either of the add-ins, so deploy the one that best matches your preferences. See the table below for a quick comparison of the CodeTwo Outlook add-ins.

  Modern Web Add-in Legacy COM Add-in
Supported platforms

Outlook for Windows
Outlook for Mac
Outlook on the web (OWA)

Support for Outlook for iOS and Android coming soon

Learn more about supported Outlook versions

Outlook for Windows

Learn more about supported Outlook versions
Supported signature mode All Outlook & combo only
Deployment Central via the Microsoft 365 admin center

Deployment instructions
Central via GPO or Intune, or individual by Outlook users

Deployment instructions
How are signatures inserted? Automatically (event-based) or manually (via the CodeTwo Signatures pane) Automatically or manually (via the Outlook's Signatures command) 
Who gets signatures? Users defined in Outlook (client-side) signature rules Users defined in Outlook (client-side) signature rules as well as other Outlook users1
Preview of cloud signatures Yes

Learn more
Disable users' default Outlook signatures Yes

Learn more
Yes (Outlook for Windows only)

Learn more
Switch between Outlook and cloud signatures Yes

Learn more
Support for CodeTwo One-click surveys  Yes No
User sign-in requirement No Yes
How often the add-in syncs with CodeTwo services? Real-time synchronization2 Every couple of minutes or manual

1 CodeTwo Outlook signatures added by the COM Add-in can be accessed by and used with other accounts configured in the same Outlook app where the add-in is installed.

Changes made in the signature management app are instantly applied to signatures in Outlook.

Modern Web Add-in deployment

See our video tutorial to learn how to centrally deploy the CodeTwo Signatures Web Add-in for Outlook to users in your organization or use the links below for instructions:


Be sure to design at least one signature template and define users who should get it. See this article to learn how to do so.

Legacy COM Add-in deployment

Use the links below to learn how to deploy the legacy CodeTwo Signatures Add-in for Outlook:


The COM Add-in works only with CodeTwo Outlook signatures, so make sure that CodeTwo Email Signatures 365 operates either in Outlook or combo mode in your organization (learn more about signature modes). You also need to create and configure at least one Outlook (client-side) signature rule. See our guide on that

See also

How to switch from legacy COM Add-in to modern Web Add-in

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