While attempting to login to the NBU administration console, the following error is observed: Unable to get data for client from server (Status 25)
Troubleshooting steps
1. Disable Win2019 UAC follow link https://asvignesh.in/disabling-uac-on-the-windows-server-2019/
2. Verify the masterserver is correctly configured with IP address and hostname
C:\Program Files\Veritas\NetBackup\bin\admincmd>bptestbpcd -verbose -debug
That error about the hostname+dns suffix namd is not allow to authorized hostname server