Hi PHONE CRAZY ,
What is the type of your Skype for Business server: on-premise or online?
Did other users have the same issue in your organization?
If your server is on-premise, do you deploy a Reverse Proxy server in your environment?
The mobile client would log in by Reverse Proxy server.
If you don’t have a Reverse Proxy server, You can refer to this official document to deploy:
https://docs.microsoft.com/en-us/lyncserver/lync-server-2013-setting-up-reverse-proxy-servers.
Then, you can use RCA (
https://testconnectivity.microsoft.com ) to test your environment. Do a test with “Skype for Business Autodiscover Web Service” as follow:
Best Regards,
Sharon Zhao
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