Often times when migrating mailboxes from exchange 2003 to exchange 2007, one will see an error when trying to login to exchange 2007 owa. The error will occur the first time the user attempts to log in via OWA on the exchange 2007 system. It’s an ugly error that exchange 2007 OWA throws, with text like ‘A problem occurred while trying to use your mailbox. Please contact technical support for your organization.’ There’s a simple fix for this that’s been documented.
In order to verify this problem, you can check the msExchVersion attribute by using the Exchange Management Shell. Run the following command in the Exchange Management Shell prompt:
Get-Mailbox <User_Name>| format-list ExchangeVersion
Note Exchange Server 2007 and Exchange Server 2010 both use the msExchVersion attribute to determine the version of Exchange Server that user objects are associated with.
If the version value is less than 0.1, Exchange Server 2007 or Exchange Server 2010 considers the user object as Read-only.
To resolve this problem, an Exchange administrator should run the following command in the Exchange Management Shell prompt:
Set-Mailbox <User_Name> -ApplyMandatoryProperties
