Occurs only for only 1 user , when TACACS+ tries to authenticate and retreive groups it fails, according to logs authentication is a success but fails when retreiving groups with error, "24027 Groups search ended with an error".
-> User id works well with all other applications except TACACS+. ->Might be a Cisco issue but is there a chance Domain Controller is resetting the connections?
Please let me know if any questions to confirm anything.