Backup Exec communicates with the Web servers that participate in SharePoint server farms to discover the farm topology. This process may take some time if Backup Exec attempts to communicate with a Web server that is unavailable. If you know that a particular Web server in a farm will be unavailable for a period of time, you can disable the communication between the Web server and Backup Exec.
To disable or enable communication between a Web server and Backup Exec
To prevent Backup Exec from communicating with a Web server, clear the check box next to that Web server's name. If the Web server is now available to communicate with Backup Exec, select the check box next to the Web server's name.