Skype for Business Can't Connect to Exchange. Your Contact

Dec 19, 2017 "Failed to Connect to Exchange Server" after Firmw This is a test phone, and since upgrading the firmware, I can log into the Trio, but it will no longer connect to the exchange. I receive the following message on the Trio itself: "Warning: Failed to connect to Exchange server. Re-enter credentials to access Exchange services." SQL Management Studio with Skype for Business : Jeff

Mobile connectivity troubleshooting | Skype Support

Sep 06, 2019 PowerShell unable to connect to Skype for Business Online Jan 17, 2020

Sep 06, 2019

Allow users to contact external Skype for Business users In Skype for Business, search for your contact in Skype for Business, and send a request to chat. If you get a message that it couldn't be sent due to company policy, you need to double-check your Office 365 URLs and IP address ranges. Ask your Skype for Business contact to send you a request to chat. Lync can't verify that the server is trusted during client