Hello,
As the network has firewall enabled, can you please check if port 10000 is free. It is used by Remote Agent. If it is not free, please do so and check the results.
Also, how many remote machines you are backing up ? Are these servers or workstations ?
If they are workstations, Remote Agent license is not required but it is server then, for each remote server to be backedup needs Remote Agent license.
Kindly update.
Regards
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