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Rel. 3.0.2160.1 / 4.0.2161.1

Release date: January 19, 2026

Important to know about DPG Outlook Office Addin

System requirements

To use the new DPG Outlook Office Addin, the following system requirements must be met:

  • Exchange Online.
  • For Windows, New Outlook requires JavaScript API 1.15.
  • For Mac, New Outlook currently only requires JavaScript API 1.14.
  • Newer versions of common browsers. DPG Outlook Office Addin has been tested on Edge, Chrome, Safari, Firefox. Note that in Private/Incognito mode, the functionality of New Outlook cannot be guaranteed, and therefore neither can DPG Outlook Office Addin.

In general, you should also strive to be fully updated on the latest OS updates as well as the latest updates/versions of Office/Outlook.

See also this page at Microsoft for more information about JavaScript.

Versions

Note that DPG Outlook Office Addin is released in two versions: version 3 and version 4. This is due to a change in the way the Send button works in New Outlook:

  • In version 3 of DPG Outlook Office Addin, secure mail is sent when the user selects Send in a new email. This means that Outlook will always try to send secure mail through DPG. This is suitable for users who often need to send secure mail, and is also closer to the user experience in DPG COM Addin (Classic Outlook).
  • In version 4 of DPG Outlook Office Addin, secure mail is only attempted to be sent when the user selects the new Send button from within the DPG AddIn itself. This is suitable for users who send secure mail occasionally.

Otherwise, the user experience is very similar between the two versions.

Only one user per AddIn version

Users of the individual releases of DPG Outlook Office Addin are assigned in Azure. Several releases can be found in Azure: Version 3 and 4, both in a test and release deployment version. It is very important that a user only exists in one of the available releases.

Test and release deployment versions

New features in this release

This release of DPG Outlook Office Addin contains three new features:

  • Mail Guard support: You can now directly see in DPG Addin whether an email will be rejected by Mail Guard. See Mail Guard for more information about how Mail Guard appears in DPG Outlook Office Addin.
  • Local configuration: Individual users now have the option to customize which settings are displayed in the individual tabs in DPG Addin. See Local configuration for more information.
  • View information: There is now easy access to see what information the DPG Service sends to the Addin, and what data is currently stored locally in the Addin. This information is particularly useful when contacting support. See Information for more information about this data and the actions you can perform in this context.