This article was previously published under Q191634
This article has been archived. It is offered "as is" and will no longer be updated.
Running Server Manager or User Manager for Domains results in the followingerror message:
Insufficient system resources exist to complete the requested service. Do you want to select another domain to administer?
The primary domain controller (PDC) shows \PIPE\samr connections in excessof 2,048. Rebooting the PDC temporarily alleviates the problem.
When a user logs on to a domain in which group policies are implemented, a\PIPE\samr connection is established with the PDC to verify groupmembership for this user. After the verification process, the \PIPE\samrconnection is not released. These \PIPE\samr connections eventually exceedthe limit of 2,048.
After this limit is reached, no new processes requiring security accountmanager (SAM) access can connect to the PDC until you restart the computer.Server Manager and User Manager for Domains require a connection to the PDCfor domain administration. Their failure to make this connection results inthe preceding error message.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
Apply the file, Userenv.dll, to each workstation.
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.