One of our clients is experiencing this error message intermittently with Outlook. It happens to several different people at different times. They are not moving mailboxes when this occurs: "The Microsoft Exchange administrator has made a change that requires you quit and restart Outlook". I've been reading other forum articles on this - Has anyone found a definitive solution for this? Thanks - Crunch

You may want to look at below. Outlook client applications cannot connect to public folders after you install Exchange Server 2010 SP1 http://support.microsoft.com/kb/2535105 James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Thanks - I'm checking it out now.

Not sure it applies since I'm running SP2 Update Rollup 2.

Hi, Please verify if you have public folder in the organization. Please have a look at the article below to verify if the issue occur due to public folder. How to stop Outlook from using Public Folders. http://blogs.technet.com/b/johnmak/archive/2012/03/26/how-to-stop-outlook-from-using-public-folders.aspx By the way, is there any change has been done to the Exchange server recently?Xiu Zhang TechNet Community Support

Thanks Xiu -- I would like to test this out - What is the best way to verify that Outlook is attempting to contact Public Folders?

Hi, From outlook, we can check the connection status. There we can find if the status of "Public folder" is established or connecting.Xiu Zhang TechNet Community Support

Any update?Xiu Zhang TechNet Community Support