Event 1173 is logged in the Application event log in Exchange Server 2003

Events that are similar to the following event may be logged in the Application event log on a server that is running Microsoft Exchange Server 2003:

Event Type: Warning
Event Source: MSExchangeIS Mailbox Store
Event Category: Views
Event ID: 1173 Description:
Error 0x6bb deleting unused restricted view from folder Folder_ID on database "Storage_Group_Name>\<Database_Name". Microsoft Exchange Information Store will try to delete the view again at the next maintenance interval. For more information, click http://search.support.microsoft.com/search/?adv=1.

These events may be logged even when logging is disabled in Exchange Server 2003.

Events that reference "Error 0x6bb" can safely be ignored.