This document describes the differences between the version of Microsoft« Message Queue Server (MSMQ) included in the Windows NT 4.0 Option Pack and the version included in Microsoft Windows NT Server, Enterprise Edition (NTS/E). For users of the Windows NT 4.0 Option Pack, the information in this document supersedes the information in the MSMQ Administrator's Guide.
For technical information or support on MSMQ, see Your Guide to Microsoft Technical Support.
MSMQ servers perform limited routing under the Windows NT 4.0 Option Pack. Because of this, they are called MSMQ servers in the Windows NT 4.0 Option Pack, and MSMQ routing servers in Windows NT Server/E. (For more information, see Routing.)
MSMQ uses four server types to control message queuing:
You must install a PEC before you can install any other MSMQ servers or clients.
MSMQ controller servers (PEC, PSCs, and BSCs) use a Microsoft SQL Server version 6.5 database to store the MSMQ information store (MQIS). The Windows NT 4.0 Option Pack does not include SQL Server version 6.5 for use with MSMQ. To use MSMQ with the Windows NT 4.0 Option Pack, you must do one of the following:
MSMQ Setup operates differently under Windows NT 4.0 Option Pack than under Windows NT Server/E. Therefore, do not rely on the Setup procedures in the MSMQ Administrator's Guide. The significant differences are:
Note You should not install the version of MSMQ provided with the Windows NT 4.0 Option Pack on a computer running Windows NT Server/E. You should instead install the version of MSMQ that is provided with Windows NT Server/E.
For more information on MSMQ setup under Windows NT 4.0 Option Pack, see the MSMQ Release Notes.
The file location and compact disc references in the MSMQ Administrator's Guide apply only to the Windows NT Server/E compact disc.
The MSMQ Administrator's Guide, and the procedures in MSMQ Explorer Help, document the MSMQ program group location at Start/Programs/Microsoft Message Queue. When installed from the WinNT 4 Option Pack, the MSMQ program group is: Start/Programs/Windows NT 4.0 Option Pack/Microsoft Message Queue.
MSMQ connector servers enable MSMQ-based applications to communicate with computers that either use other messaging systems or support MSMQ functions on hardware that is not supported by Windows 95, Windows NT Workstation, or Windows NT Server. This means that you can implement MSMQ-based applications across a wide variety of hardware platforms.
The version of MSMQ included in the Windows NT 4.0 Option Pack does not support MSMQ connector servers. MSMQ connector support is available only with the version of MSMQ included with Windows NT Server/E.
The version of MSMQ included with Windows NT Server/E supports smart routing (based on the physical topology of the network) and session concentration. The version of MSMQ included with the Windows NT 4.0 Option Pack supports routing with the following limitations:
MSMQ counts Windows NT Server client access licenses (CALs). MSMQ-based applications do not send messages to open queues on remote computers or to an open a queue from a client if no CALs are available.
The version of MSMQ provided with the Windows NT 4.0 Option Pack imposes the restriction that MSMQ servers cannot have more than 25 concurrent sessions (MSMQ and remote-read combined) with other MSMQ independent clients and servers.
For more information on CALs and changing CALs, see Chapter 12, "Licensing and License Manager," in Windows NT Server 4.0 Concepts and Planning.
MSMQ Explorer Help was not updated for the Windows NT 4.0 Option Pack release of MSMQ. As a result:
If you have a technical question about Microsoft« Message Queue Server, use the online MSMQ Administrator's Guide or consult Help by clicking the Help button during a procedure. If you still have a question, Microsoft offers technical support and services ranging from self-help tools to direct assistance with a Microsoft Technical Support Engineer. Note: The services and prices listed here are available in the United States and Canada only (see Technical Support Worldwide below).
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