ACS 5.6.0.22

[mcrink731]

I have an ACS that is configured for Radius with Active directory as it's external identity store. It is also configured for 802.1x and MAB. My domain controller is running Windows 2012 R2 but it was at Windows 2003 domain functionality level. With this setup everything runs great. Yesterday I changed my domain functionality level from 2003 to 2012 R2. Everything seemed fine until I tried to log into one of my switches using my Windows account. The ACS shows me the error message - 24444 Active Directory operation has failed because of an unspecified error in the ACS.

Anyone have any experience with this or some suggestions? Any ideas would be much appreciated. Thank you!

[Gagandeep Singh · Accepted solution]

Ideally in this case you have to rejoin AD with ACS as when upgrade was done on domain controller ACS still has made connection with old version. Just to adhere new connection from DC, I would suggest to rejoin ACS-AD.

Regards

Gagan

ps: rate if it helps!!!!

[mcrink731]

Thank you for the quick response. I did what you said and it's working again! I greatly appreciate your help. Thank you!