Turn off automatic machine account password changes

By default, Windows Server automatically changes machine account passwords every 30 days.

You can change the behavior and turn this off by following the procedure documented in Microsoft KB 154501.

The .REG file looks like this:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Netlogon\Parameters]
"DisablePasswordChange"=dword:00000001

Download: DisablePasswordChange.zip

(Thanks to Dominic Hopton for this hint.)