Can't sign in on mobile clients

Question

Hi!

I have SFB 2019 server with Edge role and reverse proxy. On Windows PC from external network SFB client run successfully. Resources that i published on a reverse proxy is accessible outside of my network. HTTPS cetrificates is trusted.

Checks on site https://testconnectivity.microsoft.com shows no errors except "Additional Details. The Microsoft Connectivity Analyzer can only validate the certificate chain using the Root Certificate Update functionality from Windows Update. Your certificate may not be trusted on Windows if the "Update Root Certificates" feature isn't enabled."
But on mobile devices (both iOS and Android) i get error when try to sign in. Something like this: "You have signed out from system. Enter your credentials to sign in again."

Please help me to solve this problem.

Thanks!

Answer 1

Hi @Александр

Does this issue only occurred in Skype for Business from external?

If so, you could try to run the following command to ensure your authentication config:

In addition, please check if there is any error messages from the event viewer on edge server.

Answer 2

Solved by changing scenario to "AllowAllExternallyAndInternally".

Set-CsAuthConfig -Scenario AllowAllExternallyAndInternally

Answer 3

Hi @Александр

Thanks for your feedback above which shared more information and glad to know that your issue is resolved now! Since our forum has the policy that The question author cannot accept their own answer. They can only accept answers by others, and according to the scenario introduced here: Answering your own questions on Microsoft Q&A

I would make a brief summary of this post so that other forum members could easily find useful information here:

[Can't sign in on mobile clients - Summary]

Issue Symptom:
On mobile devices (both iOS and Android) i get error when try to sign in. Something like this: "You have signed out from system. Enter your credentials to sign in again.

Solution:
Changing scenario to "AllowAllExternallyAndInternally".

Set-CsAuthConfig -Scenario AllowAllExternallyAndInternally  

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