Why office outlook add-in not showing up in app for some users using powershell command

Question

Hi,

We have an on-premises exchange server and developed an office add-in for outlook. When we install it to the users with New-App it does seem to install it as seen in the webmail - manage add-ins page, it is installed and enabled, but the problem is that the button which should show up on the home tab is not showing up for most of the users on Outlook app, not even showing app in the ribbon customization, it's working in OWA for everyone tho. But the interesting thing is that everything worked completely fine on development and it also works if I manually install for a user it in the manage add-ins page.

So why is it not working for all with the command and how do I install it to all users without manually doing it for every computer (as it is not feasible)?

I have tried different variations of the command already, but I don't think that should be the problem as the installation seems succesful it's just not showing up where it should in the Outlook app for some users. I have also tried and checked possible solutions that I have read but none of them worked: connected experiences was checked, sign-out and in, deleted outlook catch, etc.

Answer 1

Hi @Zoltan Dobrovits ,

Welcome to our Q&A forum!

If you have deployed an Outlook add-in app via Exchange server and it is not showing up on the Home page, there could be a few reasons for this. Here are some possible solutions:

1.Check Office version requirements: Since you have mentioned the add-in is not showing for most of the users, that means only few users can install successfully, right? The user not visible might be on an older, incompatible version of Office. For add-ins to be deployed, the Outlook client must have Office ProPlus or Microsoft 365.

2.Check Exchange requirements: Microsoft Exchange stores the add-in manifests within your organization’s tenant. The admin deploying add-ins and the users receiving those add-ins must be on a version of Exchange Server that supports OAuth authentication. OAuth connectivity per user can be verified by using the Test-OAuthConnectivity PowerShell cmdlet. For more information on requirements, see Determine if Centralized Deployment of add-ins works for your organization.

I hope this helps!

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Answer 2

Hi Zoltan,

did you ever find a Solution for this issue? - I´ve got the same problem.

I updated the Office / Outlook Installation manually, but this also does not work.

When I uninstall and install Office completly new with patchlevel from August 2024 then I can see the Add-Ins...