Mac OS X Server Profile Manager Password Reset

Hi all,

Is there any way to reset the user name and password for profile manager on Server X. I have access to the host machine, I can login into the management console, but when I try to login to the web UI in Safari, I always get 'invalid username or password'. One could simply think that I have forgotten what the login details are, but I have them saved in LastPass, therefore there is no way I have simply forgotten what they are. Very mysterious indeed. Any way to reset the password?

Many thanks !