Joined domain is unavailable in ISE

[kingsyedfaizan12962]

We have Cisco old Version 1.4.

our all  Wireless SSID is authentication with it.

Suddenly all user were not able to authenticate.

In ISE we found two Logs at that time as mentioned below.

 JOINED DOMAIN IN UNAVAILABLE 

 ACTIVE DIRECTORY FOREST IS UNAVAILABLE

[balaji.bandi]

Suggest to check with ISE AD diagnositc tool from GUI :

Active Directory --> AD ->> Active Directory Diagnosis tool (make sure you have trust relation)

also enage with Active Directory team check any changes and see any Logs on the evern viewers.