Hello,
I tried to find solution for my problem, but I used all solutions I knew or could find on the web.
I am running two DC's main one and secondary in second office.
DC on both sites acts also as DHCP, DNS and NPS.
On main site I started to having a problem with accessing the AD. In my log files I found continuously errors
Error 4401
Domain controller contoso.com for domain contosois not responsive. NPS switches to other DCs.
4400
it switches to dc2 but then again domain controller is not responsive...
In that moment I got each times errors:
6274
The Network Policy Server was unable to connect to a domain controller in the domain where the account is located. Because of this, authentication and authorization for the RADIUS request could not be performed.
On secocond DC - DC2 everything works well. I checked and the server is not registered in AD (added to the security group RAS and IAS servers, but even I added domain controller to that group it didn't change anything.
Any idea?
or backup NPS, uninstall NPS and install again and import settings?
thanks for any advice
Andrew