https://evan.wtf/tags/post/Recent content in POST on Evan HoffmanHugoen-USEvan HoffmanTue, 01 Mar 2011 12:30:30 +0000https://evan.wtf/2011/03/01/autodiscover-mysteriously-stopped-working-exchange-2010/Tue, 01 Mar 2011 12:30:30 +0000https://evan.wtf/2011/03/01/autodiscover-mysteriously-stopped-working-exchange-2010/<p>I had <a href="http://technet.microsoft.com/en-us/library/bb124251.aspx">Autodiscover</a> working for months but recently it just stopped. I&rsquo;m not sure why, but it may be related to removing the last Exchange 2003 servers from service recently. Maybe some setting got wiped from AD when I uninstalled Exchange 2003 (as per <a href="http://technet.microsoft.com/en-us/library/bb288905%28EXCHG.80%29.aspx">the procedure</a> Microsoft gives). Basically what was happening was that the email address field was being autopopulated by the user&rsquo;s UPN rather than their email address. Since we have a <a href="http://support.microsoft.com/kb/300684">single label domain</a>, the UPN isn&rsquo;t a valid email address, and autodiscovery fails.</p>