http://192.168.2.20/blogs/doverton/archive/2012/01/07/diagnosing-connectivity-problems-to-exchange-and-office-365.aspxI was asked today about an Outlook synchronisation of the address book over the web (RPC over http) and did some digging and found this excellent diagnosis tool - https://www.testexchangeconnectivity.com .&#160; The nice thing is that it tests many productsenCommunityServer 2008.5 SP2 (Build: 40407.4157)http://192.168.2.20/blogs/doverton/archive/2012/01/07/diagnosing-connectivity-problems-to-exchange-and-office-365.aspx#24130Sat, 07 Jan 2012 17:31:27 GMT72050d9c-4f41-4a16-9f70-ebbf2c98a2c7:24130Paulie<p>I&#39;ve used this site a number of times, it is really handy and works really well.</p> <div style="clear:both;"></div><img src="http://192.168.2.20/aggbug.aspx?PostID=24130" width="1" height="1">