On a computer that is running Microsoft Exchange Server 2007, you create a managed custom folder and then specify the maximum size for that managed custom folder. However, if you copy messages into the same managed custom folder by using Microsoft Office Outlook Web Access (OWA), the storage limit does not affect the folder.
The storage limit is not checked for the managed custom folder when you copy messages into that folder.
To resolve this problem, install Update Rollup 1 for Exchange 2007 Service Pack 2. For more information about Update Rollup 1 for Exchange 2007 Service Pack 2, click the following article number to view the article in the Microsoft Knowledge Base:
971534 Description of Update Rollup 1 for Exchange Server 2007 Service Pack 2