Backup Exec Exchange backups hanging

Backups hanging and never completing at random place during Exchange backups, despite having been working for a long period previously.

On the Exchange server, add the following registry entry…

Key: IRPStackSize (case sensitive).
Value: 30 (Hex)

Source: e00084f8 – The network connection to the Backup Exec Remote Agent has been lost – Check for network errors – refer to link V-79-57344-34040 (