I'm testing the New Outlook desktop version, and I have encountered an issue with add-ins. My primary inbox is Jeff@furni*******.com, and when I create a new email from this account, the signature add-ins load fine. I am using the CodeTwo 365 Signatures add-in, but it seems that the add-ins are displayed only for the primary default inbox and not for any other mailboxes. However, when I create a new email from another inbox, such as Jeff@edro*******.com, the add-in pane doesn't load, and the signatures are not imported.
This problem seems specific to the new Outlook desktop version. When I use the Outlook web app at https://outlook.office365.com/ or the old Outlook desktop version, the add-ins load correctly for all mailboxes.
It appears that the new Outlook desktop version only loads add-ins based on the primary mailbox. Even if I switch to another mailbox account, the add-ins do not load, unlike in the desktop and web versions where they load as expected once I choose another mailbox on the left pane and click compose email ill see the addins assigned to that mailbox on the editor pane.
Now if I actually change one of the mailboxes to "Set as Primary Account" the addins will load fine but only for that mailbox.
Version Details:
New Outlook Desktop Version:
- Microsoft Outlook Version: 1.2024.529.200 (Production)
- Client Version: 20240531006.09
- WebView2 Version: 125.0.2535.85
- Session ID: bd1b8ccd-6d00-5b4b-bb4a-1307f365c0bf
Old Outlook Desktop Version:
- Microsoft® Outlook® for Microsoft 365 MSO Version 2405 Build 16.0.17628.20006 64-bit
Is this a known issue, and are there any workarounds or solutions available?
