Is there a problem using Computer Management > Local User and Groups > Users to change the Administrator password in Windows Home Server? Is there a chance it will cause any issues with the system? I ask as the system warns against using server tools to change settings. I have access to the system with my account, but the Administrator password isn't working,forgotten whatever and needs to be changed.
The Administrator user's password can be freely changed if you've forgotten it, though Home Server recommends never using the built-in Administrator and only using a separate account that also has admin privs. Only changing system accounts would cause certain services to stop functioning (like the ASPNET account); the majority of the services, including backup, filesharing, and streaming, use one of the System accounts that have no passwords.
With that said, the above method is doing the same thing as changing it via console would (in fact, technically, the dashboard is run over RDP....). The only additional functionality I see via dashboard is the ability to set a password hint.