Hi Jim,

Thanks for your post and Merv's input.

In addition, this error message may occur if the following condition(s) is true:

o       This issue occurs because of a limit on the number of items that clients can open. By default, this limit is set to 100 for attachments and 250 for messages. This
problem may occur if a MAPI client opens more than the default value of certain server objects.
o       A program that is running on a client computer opens many MAPI sessions to the Exchange Server computer. The number of MAPI sessions is larger than the
permitted limit.
o       You are using Microsoft Office Outlook 2007, and you add a large additional mailbox to your profile. For example, this issue may occur if the additional mailbox
contains more than one thousand folders.

To try to resolve this error, please refer to the following KB articles:

Your Exchange Server 2003 computer may stop responding after a MAPI client opens more than the default value of certain server objects
http://support.microsoft.com/kb/830829/en-us

Event ID 9646 is logged when you try to send many messages in Exchange Server 2003
http://support.microsoft.com/kb/830836/en-us

Event ID 9646 is logged in the application event log of your Exchange Server 2003 computer when a client opens many MAPI sessions
http://support.microsoft.com/kb/842022/en-us

Hope this helps.

Best regards,
Robbin Meng(MSFT)
Microsoft Online Newsgroup Support

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