Public Folders: Outlook 2007 gets "The set of folder could not be opened. The attempt to log on to M

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I have 2 Exchange servers. Ony one hosts the Public Folder Information Store, The user can access Public Folders if they go through OWA. I have had them log on and create profiles on several different computers, with different version of Outlook. The result is always the same. This is the same in either cached mode or direct. They see the above error when they attempt to expand Public Folders. No problems with their regular email. Jerry A. Ruth


Is it an exchange 2003 environment?

Does the issue happen to all users, including the newly created user?

Please check if there"s any error event in the application log on the exchange servers after reproduced the issue

Please increase the diagnostic logging for public folder via ESM, reproduce issue, and then monitor the application log

· Service: MSExchangeIS/Public Folder

· Catgories: General, Logons, Access Control, Views

Please restart the “Information Store” service on both servers so that the store cache would be updated with the correct default public folder database information. Incorrect information can appear the identical symptom


HOWTO increase the Logging Levels in Exchange 2003,2007 and 2010

James Luo



James, sorry it's taken me so long to get back to this issue.

We are in an Exchange 2007 environement using a mixed bag of Outlook 2003 and Outlook 2007 clients. This just popped up for another user this morning. I was the only one having the problem before and I went around it by using OWA. When the user clicks on Public Folders the error, " The set of folders cannot be opened. The attempt to lo on to Microsoft Exchange has failed." Searched high and low and have not found a fix for this. It appears to be user permissions related but where? How to check and correct?

Jerry A. Ruth
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