Microsoft small business knowledge base

Article ID: 204018 - Last Review: October 26, 2013 - Revision: 2.0

This article was previously published under Q204018
This article has been archived. It is offered "as is" and will no longer be updated.


When you attempt to start the License Manager tool from any domain controller, you may receive the following error message:
RPC Server is too busy.
When this occurs, remote procedure calls still work correctly for other tools such as Event Viewer, Server Manager, User Manager, and so on.


This behavior can be caused by a loss of network connectivity, or by a damaged License Manager database.


Attempt to restart the License Logging service on the primary domain controller (PDC):
  1. Click Start, point to Settings, and then click Control Panel.
  2. Double-click Services.
  3. Click the License Logging service.
  4. Click Stop to stop the service.
  5. Click Start to restart the service.
  6. Click Start, point to Programs, point to Administrative Tools, and then click License Manager to see if License Manager functions correctly.
If you still receive the error message, you may need to reset the License Logging service. For information about how to do this, please see the following article in the Microsoft Knowledge Base:
153140  ( ) How to Reset License Manager Information
For information about how to perform this operation on each server in your enterprise, please see the following article in the Microsoft Knowledge Base:
194065  ( ) How to Reset License Manager Throughout an Enterprise

More information

You may also need to troubleshoot network connectivity to verify that the domain controllers can communicate. The error message may be a symptom of NetBIOS name resolution issues, such that the PDC is not accessible from the backup domain controllers or member servers.

For additional information, please see the following article in the Microsoft Knowledge Base:
198132  ( ) Replication of License Manager Information Unsuccessful

Applies to
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows NT Server 4.0 Standard Edition
kbnosurvey kbarchive kberrmsg kbnetwork kbprb KB204018
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