I have a demo/test (luckily) build of Sharepoint 2013 running on a server in-house. When I set it up it asked me to allocate a domain user as the admin, I use my own domain admin account (from Active Directory).
Since this, I have changed my password in AD. And I cannot change it back to the one I had before due to password policy.
Now trying to access sharepoint, it just gives a 503 error. And vent viewer on the server logs an Audit Failure "Unknown user name or bad password"
So how can I change either the user/password that sharepoint is using, or change just the password that it is using?