Delegate Calendar view displays August 31, 4500 (51068)

A mailbox  had been switch to Exchange 2007, a problem occurs when a delegate  to the mailbox opens the mailbox's  calendar  then clicks on the 'Calendar...' button to re-plan the meeting.   A window appears to fix the date and  the calendar bar displays the date of  August 31 4500.   Numerous things have been tried such as  cleanfreebusy (Microsoft KB Article 296192 - OL2002: Additional Command-Line Switches - http://support.microsoft.com/kb/296192) on the mailbox but  it didn't fix  the problem.   The delegate doesn't have the problem with other delegated mailboxes.

This is a know Microsoft problem related to Exchange Server 2007 Enterprise Edition and Exchange Server 2007 Standard Edition.

Please see Microsoft KB article 930801 - The calendar opens to August 31, 4500 or to September 1, 4500 when you view a meeting request in Outlook - http://support.microsoft.com/kb/930801