jabber application is not opening

Question

when trying to launch the jabber app inside the Teams app . it will load and ask for authentication. once authentication is finished . we ill get the error 400. Jabber is working fine outside the teams app

Jabber is allowed in Teams admin center and also app is enabled in entra ID. HOw to find the root cause for this issue and resolve the issue.

Answer 1

Thank you so much for getting back to me, @G Sai.

You can review your Conditional Access policies directly in Entra (please see the attached screenshot), and you can also learn more about how these policies work here: Microsoft Entra Conditional Access: Zero Trust Policy Engine - Microsoft Entra ID | Microsoft Learn 

If you’ve already confirmed that Jabber is allowed in both the Teams Admin Center and Entra, and after checking Conditional Access you don’t see any policies that would block third‑party apps, then the best next step would be to submit a support ticket to Microsoft engineering so they can perform a deeper investigation.  

I hope you can understand that as a forum moderator, I don’t have the permissions or backend tools needed to check your tenant directly. And since the issue involves a third‑party app (Jabber), it may require additional troubleshooting on the backend. 

You can follow Microsoft’s official guide to open a support ticket here: Get support - Microsoft 365 admin | Microsoft Learn 

Tips: You can switch off the Support Assistant as shown in the screenshot, then type a few short characters into the search box and select Get Help. After that, wait for the Contact Support button to appear and click it. When you reach the contact‑method step, I recommend choosing Email, as it tends to be a more consistent and effective option in my experience. 

Once the ticket opens, a technical support technician can conduct a remote session to investigate the situation, review the backend configurations, and run the necessary synchronization tools to resolve the issue. If further intervention is required, they can refer the matter to a specialized team for in-depth analysis.     

Thank you again for your understanding. I truly hope the issue is resolved quickly by the senior support specialists, and that your organization will soon be able to use the apps smoothly without any interruptions. 

Answer 2

Hi @G Sai, 

Thank you for posting your question in the Microsoft Q&A forum. To understand what’s happening and get a clearer picture, I wanted to check a couple of things with you: 

• Are you able to launch the Jabber app from the Teams web version? 
• When you allowed the Jabber app in the Teams Admin Center, is it currently available for everyone, or only for certain users or groups? 

• Also, could your organization have any Conditional Access policies that might block the authentication flow when the app runs inside Teams? 
• Ae you testing this as an admin, or as a regular user? If you’re an end user, it might help to ask your admin to try opening Jabber inside Teams to see whether they get the same 400 error. 

Whenever you have a moment, feel free to reply here under this post with the details I mentioned earlier.  

Thank you for your patience while we work through this together. I’ll do my best to look into anything I can from my side and help you move closer to a solution. 

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