Can't re-establish existing accounts after service account change
We are using ARS 6.2 SP4 and we recently changed our service account password in Active directory and also made the change on the Notification Server to reflect the password change (From the NS console - Configure -> Notification Server -> Application Identity). After the change, we were able to install new ARS accounts but could'nt re-establish existing accounts. Mind you, the issue is not happening on all our ARS clusters, but for most of them which has me puzzled. The only error I see is in the Windows Security log identifying a login failure when the client tries to re-register. I've already tried to re-set the account password again and rebooting all the servers which hasn't helped.
It seems the password is somehow set somewhere on the ARS server itself and not just the NS, but I have not been able to find it.
Any help would be appreciated.