Skype for Business, Lync and Exchange Web Services (EWS) and different DNS Domains- Exchange crawling e.g. for presence
(This is an updated version 2.2: 09.07.2015)
This blog entry is valid for Lync 2010, Lync 2013 and Skype for Business Server.
Generally, I'll write a new blog article, since the conversion history over multiple device and other service have change with Skype for Business 2015 Server. Once this written, I post the link here.
there is always confusion in how Lync is crawling Exchange Web Services (EWS).
Generally it is necessary to understand how DNS must be implemented:
Just remember, identify if you have DNS Split configuration, different internal and external DNS names and what are your SMTP and SIP Domains.
Very often you find in Lync/ Exchange deployments an issue, where the Lync configuration show up with empty:
EWS Internal URL
EWS External URL
EWS Information = EWS not deployed
Therefor Exchange Web Service are not connected deployed and several Lync Integration Features are not working, e.g. Presence Information based on your Outlook Calendar.
The feature depending on EWS ar…