World’s first email signature Web Add-in for Outlook on the web and Outlook desktop is powered by CodeTwo

[Update]: This blog post was updated on May 26, 2021 to include information on Web Add-in’s general availability.

CodeTwo is the first email signature software vendor to release a modern signature Web Add-in that integrates with both Outlook for Windows and Outlook on the web (OWA)! We’ve once again worked closely with the Microsoft Outlook Add-in Team and implemented their latest API into our signature service to provide seamless multi-platform integration (support for Outlook for Mac coming next!).

World’s first email signature Web Add-in for Outlook on the web and Outlook desktop is powered by CodeTwo

As a quick reminder, we first announced the new add-in for CodeTwo Email Signatures for Office 365 together with Microsoft back at Ignite 2020. The add-in lets you add email signatures in real time as you compose a message in OWA and, starting today, also in the Outlook desktop client for Windows. It can be deployed organization-wide directly from the Microsoft 365 admin center and is available to end users automatically, without any interaction from them. To be able to use the add-in, our email signature management software needs to work in client-side or combo mode (learn more about signature modes).

The add-in is now generally available for Outlook for Windows and Outlook on the web / OWA (and soon also for Outlook for Mac). Learn more

If you haven’t used our service yet and want to start centrally managing email signatures in your organization, get a free trial of CodeTwo Email Signatures for Office 365.

More exciting features coming soon. Stay tuned!

CodeTwo Email Signatures for Office 365 is the world-leading and highest rated email signature solution for Microsoft 365 & Office 365. It’s a cloud service deployed on Microsoft Azure in a region of customer’s choice, backed up by world’s only 4-level security system compliant with ISO/IEC 27001 & 27018 and a free 1-year Microsoft 365 data backup service, which makes it the most secure signature software on the market. Our product is co-engineered with Microsoft and awarded by Microsoft for exceptional Customer Experience.

CodeTwo offers solutions for organization-wide email signature management, data backup and migration for Microsoft 365 & Exchange Server, developed for 15 years and used by over 90k organizations worldwide, including Facebook, Samsung and UNICEF.

4 thoughts on “World’s first email signature Web Add-in for Outlook on the web and Outlook desktop is powered by CodeTwo


  1. Does this mean the email message stays within Microsoft and does not go through Code Two email services? Similar to client-side mode, but with the benefits of being able to use it on any device and management through Azure?

    • Yes, exactly. The modern email signature Web Add-in works similarly to the classic COM add-in (in client-side mode), plus it supports OWA and very soon also Outlook for Mac. One of the biggest advantages is that end-users don’t need to install anything at their end- the Web Add-in is deployed org-wide (or to selected users only) from Microsoft 365 admin center.

  2. I would swear there was already an Add-In that worked in OWA and displayed signatures during email composition.

    Can you give us a summary of new features that might compel users to consider use of the Add-In?

    • We have developed another add-in for Outlook on the web earlier. It can be used to dynamically display server-side email signatures. Learn more
      The new Web Add-in dynamically inserts client-side email signatures directly into the email body, as you compose a message and lets you choose from available signature templates. Take a look at a short demo

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