we have a windows 2008 R2 Virtual machine (Vmware).
It's been running fine for ages. However, now when I try to log onto it by RDP with the IP address, it asks me for the domain credentials. When I enter them, I am rejected.
When I do the same thing using the FQDN, it asks me for credentials and when I enter them, I'm in!
Also, when I go to the Vcenter console and log onto the machine using the same credentials, it also works!
In the event id for security, I'm getting the event ID 4625 showing up and something about a NULL SID when I get rejected.
Is it possible, that this machine needs to be taken off the domain. Applied a Newsid (risky?) Rejoined to the domain?
It's a very important server, so I need to sort this out soon.
Thanks for your help:)