In my eventviewer I have multiple event id’s 1173 which seem to occur during normal working hours.

Event ID: 1173
Source: MsExchangeIS Mailbox Store
Error 0×6bb 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.

Solution

This error can be ignored. To bad it can’t be disabled…