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The message store has reached its maximum size.
-Cause:
This message relates to a Microsoft Outlook 2000/2003 issue where the .OST (offline storage file) grows too large and/or becomes corrupted.
This error may also relate to an issue where an Outlook 2000/2003 .PST file grows larger than 2GB and subsequently may become corrupted.
-Solution:
There are a number of solutions to this issue depending on what the end-users's needs are.
If the user needs to get back up and running as soon as possible, then we suggest archiving the current Outlook account, and creating a new profile. A new profile will come complete with a new PST file as well as a new OST file.
Another option is to attempt to repair the PST and OST files within Outlook Inbox. Microsoft Knowledgebase offers support:
How to use the Inbox Repair Tools to recover e-mail messages in Outlook 2002 and Outlook 2003.
Repair an .ost or .pst file in OutlookHow to configure the size limit for both (.pst) and (.ost) files in Outlook 2003 and in Outlook 2007For further inquiries or issues Microsoft offers Outlook information portals.
Outlook 2000:
Microsoft Office Outlook 2000 Solution Center
Outlook 2000 Help and How-to
Outlook 2003:
Microsoft Office Outlook 2003 Solution Center
Outlook 2003 Help and How-to
Outlook 2007:
Microsoft Office Outlook 2007 Solution Center
Outlook 2007 Help and How-to
http://office.microsoft.com/en-us/outlook/FX100647191033.aspx