O365 Skype for Business – Lync cannot verify that the server is trusted for your sign-in address
During a pilot migration from Lync 2013 to Skype for Business Online (Office 365), the following warning popped up: Why does Lync 2013 not trust its own company? :) Appearantly we had configured a group policy a long time ago, which was set to only trust our own company name. I.e. contoso.com. Once you Enabled …