SIP and Primary SMTP domains do not match. Skype for Business 2015 client displays EWS not deployed.
Hello, I have an Exchange 2007 and Skype for Business 2015 Server on-premise solution deployed.
Originally, functioning fine with SAN certs using <company>.org domain for required certs on mail server and SfB 2015 Standard Edition solution (Standard, Edge and WAP servers).
Primary SMTP domain was <longcompanyname>.com (domain NOT included in the SAN certs) and everything functioned fine including Conversation History and Calendar synch between Outlook (2007-2013) and Skype for Business 2015 client.
Fast forward a few years and....
New domain purchased and Primary SMTP for each user changed to <shortcompanyname>.com
NOW, Conversation History and Calendar do NOT synch with Outlook anymore.
Research appeared to state I can have this circumstance without issue after running 'Set-CsClientPolicy -DisableEmailComparisonCheck $true'
Ran the powershell command on the SfB Standard Edition server, rebooted test client and SfB solution. STill Outlook Integration Error and EWS not deployed in SfB client Configuration info.