Friday, March 19, 2010


Downlevel Client Support Service Is Being Removed From Windows 7

And The Downlevel Client Support Service that is a part of Microsoft Message Queuing (MSMQ) is being removed from Windows 7.

The MSMQ Service is the core service that makes it possible for you to perform basic Message Queuing functions, such as creating and managing queues, sending and receiving messages, and so on.

What are the major changes?
As a result of this change, Windows NT 4.0 and Windows 2000 MSMQ clients running against Windows Server 2008 R2 domain controllers that have no Windows Server 2003 or Windows Server 2008 domain controllers in the same environment will not support MSMQ in domain mode. This change affects customers who have Windows NT 4.0 or Windows 2000 clients that are joined to domain controllers, which have been upgraded toWindows 7. If any domain controller in these environments is running Windows Server 2008 or earlier, full functionality remains available.

MSMQ has several dependencies on a directory service infrastructure; in version 1.0 the MSMQ product implements its own directory through a SQL-based database named MQIS and subsequent versions of MSMQ use Active Directory as its directory. MSMQ 1 and MSMQ 2 (Windows 2000) clients use a proprietary RPC-based interface to communicate with the underlying MSMQ Directory.

The MSMQ directory service server implements the server-end of this RPC interface and is required to be installed on the  domain controller. This proprietary RPC interface is deprecated in MSMQ 3 (Windows XP / Windows Server 2003) in that, newer MSMQ clients use LDAP to directly communicate with the Active Directory. The deprecated RPC Server is still available in Windows Server 2003 and Windows Server 2008 domain controllers as a separate Down-level Client Support service to enable inter-operability with Windows®°2000 and Windows NT 4.0 clients.

There are two solutions for this:
  1. Upgrade the client from Windows NT 4.0 or Windows 2000 to Windows XP, Windows Vista, or Windows 7.
  2. Add a Windows Server 2003 or Windows Server 2008 domain controller to the environment.


About bench3 -

Haja Peer Mohamed H, Software Engineer by profession, Author, Founder and CEO of "bench3" you can connect with me on Twitter , Facebook and also onGoogle+

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