Number of possible simultaneous connects to backup server on Windows
The backup server process hiserv.exe has a limitation of 64 simultaneous connects by default.
You can increase the number of allowed connects by editing the file installdir\Hiback\hiserv.ini on the backup server.
Add or change the entry to increase the number of allowed simultaneous connects to 128.
Restart the Hiback service on the backup server to make the change effective.