Reset Windows domain user password

Is there a way to reset a domain user password remotely without logging in to a domain controller using Remote Desktop?

I could not find any MMC plugin in non-server Windows (Windows 7 Ultimate in this case) to manage Active Directory which is understandable.

You can download the Remote Server Administration Tools for Windows 7. This will give you all the MMC snap-ins you'd normally find on the Server OSes. However, the machine you're running this from will likely have to either be a domain member or at least connected to the same network the domain is on in order to connect to your DC remotely.

What's wrong with the RSAT?

http://www.microsoft.com/Downloads/details.aspx?familyid=7D2F6AD7-656B-4313-A005-4E344E43997D&displaylang=en

Active Directory Users and Computers is included

http://technet.microsoft.com/en-us/library/ee449470(WS.10).aspx

You could use pspasswd from sysinternals tools.

usage:  pspasswd [\\computer[,computer[,...] | @file [-u username [-p password]]] Username [NewPassword]] 

computer Run the command on the computer or computers specified. If you omit the computer name the command runs on the local system and if you enter a computer name of \\* then the command runs on all computers in the current domain.

@file Execute the command on each of the computers listed in the file.

-u Specifies optional user name for login to remote computer.

-p Specifies optional password. If you omit this you will be prompted to enter a hidden password.

Username Specifies name of account for password change.

NewPassword New password. If ommitted a NULL password is applied.