Article ID: 309198 - View products that this article applies to.
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If mailboxes on Exchange 2000 Server contain over 4 gigabytes (GBs) of data, Exchange System Manager may show the total size of the mailbox as 0 instead of the true mailbox size.
This problem can occur if Exchange System Manager reads the wrong property tag for mailboxes that are larger than 4 GB.
To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/301378/EN-US/ )XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack
Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.
This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 2.