Add-in warning / "currently upgrading"

js_multi and AnthonyPounder , we were able to track down the root cause of the issue and have a fix.

In summary, we recently added a new permission to the Viva Sales Outlook Add-In, which requires users/customers to update the Add-In to the latest version. However, the update experience in Outlook has some flaws and doesn't allow for a seamless update flow, which is why the issue you reported is happening.

The issue should auto-resolve some time in the next 72 hours. However, you have some options if you want to accelerate the fix and apply a manual work around based on how the Viva Sales add-in has been installed in your inbox:

• If you installed the add-in via the user flow, i.e., by navigating to "Get Add-Ins" in your Outlook Client and installing it on your own, the solution is to uninstall the add-in and re-install it.
   
• If you installed the add-in via the admin flow, the solution is to uninstall and re-install the add-in via the Microsoft Admin portal (http://admin.microsoft.com). Please note, in this scenario it can still take up to 24 hours for the add-in to get fixed for individual users. 

We are also in the process of publishing an official troubleshooting guide for this issue.