- Polycom VVX 601
- Skype for Business Online (Office 365)
- S/W 5.6.0.17325
Notice yesterday the message "SSL/TLS Handshake Failed". Tried a couple of reboots and that didn't solve it.
Any thoughts on the cause?
In my own trial and error...
I have now disabled device updates on the Skype for Business Online Management Shell / Configuration File on the handset to allow phones to run on a different version. Then installed S/W 5.9.0.9373. Phones now seem fine.
So my presumption is...
- Microsoft done an update on the O365 servers that now require a different TLS version.
- But Microsoft have forgotten that Polycom S/W 5.6.0.17325 doesn't support it.
- And Microsoft haven't pushed out device updates first
When installing S/W manually, my choice of 5.9.0.9373 was from the version qualified in Microsoft's list of certified IP phones https://docs.microsoft.com/en-us/skypeforbusiness/certification/devices-ip-phones#conference-phones.
But then if 5.9.0.9373 is the version Microsoft list, why is 5.6.0.17325 being pushed out as the qualified version for Skype for Business Online?
