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Server SSL certificate could not be proven ,Its security certificate is not trusted by the device ..
Server SSL certificate could not be proven ,Its security certificate is not trusted by the device Teams Native Phone Failed to connect to sfb server sipfed0A.online.lync.com
The Phone has the correct time..
I am seeing this issue for all the Teams Native Phone
I am seeing this issue for all the Teams Native Phone
Have you made sure that there are no proxies or SSL interception devices interfering with the connection?
Have these phones ever worked on this network? If so, what has changed since then?
Have these phones ever worked on this network? If so, what has changed since then?
This has worked and there is no functionality issue but these errors are there since changes made for Certificate Authority by Microsoft
Suhap If you are referring to the change documented at TLS certificate changes to Microsoft 365 services including Microsoft Teams - Microsoft Community Hub that happened back in 2022, that did not have had any impact on Teams Native phones, as the new root certificate is already trusted by Android. Of course, you should ensure that your devices are running an up-to-date version of the firmware.