Event ID 16388 — Windows to UNIX Password Synchronization Service Availability

Updated: December 16, 2008

Applies To: Windows Server 2008 R2

Windows to UNIX Password Synchronization Service Availability indicates the operational state of the Windows to UNIX password synchronization service and its availability to synchronize user account passwords to the UNIX environment that are changed in the Windows environment.

When Password Synchronization is configured for Windows-to-UNIX synchronization, and a password is changed on a Windows-based computer running Password Synchronization, the Password Synchronization service determines whether the user's password is to be synchronized on UNIX computers. When the Password Synchronization service is operating normally, it encrypts the password and sends it to the Password Synchronization daemon on each computer with which the Windows-based computer is configured to be synchronized. The daemon then decrypts the password and changes the password on the UNIX host.

Generally, the service is available if it has read and modify permissions in the Windows Registry, and if the computer on which Password Synchronization is installed remains an Active Directory® Domain Services domain controller.

Event Details

Product: Windows Identity Management for UNIX
ID: 16388
Source: Microsoft-Windows-IDMU-PSync
Version: 6.0
Message: This copy of Password Synchronization is either not licensed or the license has expired.


Make sure that the feature has been installed correctly on this version of Windows

Password Synchronization is not supported on this edition of the Windows operating system. This version of Server for NIS runs on Active Directory Domain Services domain controllers that are running the following server-class operating systems:

  • Windows® Server 2003 Release 2 (R2)
  • Windows Server 2008


The Windows to UNIX password synchronization service is functioning normally in the absence of any of the following messages in Event Viewer. If any of the following messages are logged in Event Viewer, the service cannot function normally.

  • IDMU Password Synchronization event 16388
  • IDMU Password Synchronization event 8194
  • IDMU Password Synchronization event 8193

Windows to UNIX Password Synchronization Service Availability

Identity Management for UNIX