I was wondering if someone could help with this. I have recently added a new Storage Group to a server with 4 New Databases. It appears that all the new databases have an issue with their Systemmailbox. I have an application that connects to all exchange servers through the systemmailbox on each database. It works fine for every database apart from the 4 newly created ones. I tested this by using the method below. http://ex005/exadmin/admin/mydomain.com/mbx/SystemMailbox{597E6FB1-7E04-4C39-807D-F76FE8B5809C}/Only on the problem systemmailboxes in the new storage group do I get a 404 error page cannot be displayed. I checked permissions and even unhide the systemmailboxes and gave myself Full Mailbox access and still have the same issue, however running http://ex005/exchange//SystemMailbox{597E6FB1-7E04-4C39-807D-F76FE8B5809C}/allows me to connect just through the exadmin do I get the 404 error. Does anyone know what would do this. I can connect to other databases on this same server, just not the new ones.