I am running Exchange 2013 on Server 2012 Datacenter (VM). Windows 7 clients with Outlook 2010 work fine. Windows XP clients with Outlook 2010 prompt for credentials (user name and password) each time Outlook is started, and checking the "Remember my password" box does not prevent this from happening the next time. The "Always prompt for logon credentials" checkbox on the "Security" tab of the "More Settings" section of the Exchange account is not checked. I have found a myriad of posts with similar issues, but they all seem to have to do with SBS/Exchange 2007, and I haven't come across something that works as a solution for me. One suggested certificate issues, and I was having certificate security warnings, but I got that resolved. I am hopefuly that the fact that this only happens on Windows XP will be telling.
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