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Title
Failed to connect to backup agent when NTLM is restricted in organization -
Description
You may observe following error in ERDServer.log:
Oct 19 10:59:53.412 [7316:5208] Warn Cannot get interface version: 0x00000005Oct 19 10:59:53.412 [7316:5208] Warn Unable to get version. RPC Status: 5, _BackupGetVersionInfo.Oct 19 10:59:53.412 [7316:5208] Error Throwing TException:Oct 19 10:59:53.412 [7316:5208] Error Failed to connect to backup agent:Oct 19 10:59:53.412 [7316:5208] Error Throwing TException:Oct 19 10:59:53.412 [7316:5208] Error Failed to connect to backup agent:Oct 19 10:59:53.521 [7316:5208] Error Error creating backup: Failed to connect to backup agent:Oct 19 10:59:53.521 [7316:5208] Error Cannot establish the connection to the backup agent.
And following Event that indicates that NTLM is blocked in this environment
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Cause
This might happen when NTLM is restricted in organisation and Kerberos ports are not opened in firewall settings -
Resolution
Ports 88 and 464 are the standard ports for Kerberos authentication. These ports are configurable. Port 464 is only required for password change operations. Ports 88 and 464 can use either the TCP or UDP protocol depending on the packet size and your Kerberos configuration
If RMAD server is located on a standalone server or belongs to another forest this scenario is currently not supported enhancement request 253654 has been raised to address this.