It is routine that a Mac OS X Server administrator may use AppleFileServer Remote Administration to change user passwords. If the password for Macintosh Manager User is changed, though, a conundrum results. Although the password that Macintosh Manager Server expects from a system logging on as "Macintosh Manager User" has been changed successfully, there is no direct way in which the password that is automatically sent by these systems to the server can be changed to match. This password is embedded and implicit.
The matter can be resolved by the following actions:
1. Quit and restart MacintoshManagementServer
2. Reboot the server (which accomplishes the same thing)
This works, because each time MacintoshManagementServer is restarted (which also happens when the system is rebooted), a new password is formulated and applied to the Macintosh Manager User account.