Forum Discussion

Brass Contributor

Oct 10, 2019

Polycom VVX 411 Signing out Users at Random

Hello, We are about to roll out Polycom VVX411 phones using SfB but in our testing users are getting logged out seemingly randomly between 7-30 days. They do get an error "Exchange authentication f...

Brass Contributor

Jan 22, 2020

Unfortunately, we still don't have a solution. I have had a ticket open with Microsoft for approx. 3 months now and I think they have ghosted me. This sign out happens on Polycom and Audiocodes phones. We have done all the logging suggested by Microsoft and they confirmed the issue is on their end but cannot provide a resolution. We are a cloud only deployment.

YadwinderMehal

Copper Contributor

Jan 22, 2020

CosmoDenger Thanks for responding to my message.

Actually I already taken the debug log and found below error :

'ews' Service CSoapTransaction network error = Host requires authentication (204)

New credentials needed for accessing Exchange Web Services, deactivating to wait for new credentials

then it start showing "Warning Authentication failed re-enter password to access the Calendar" message on screen and to fix that We just need to signout and signin again, then it start working again. But after few days shows same error message again.