can't map a drive

Have you exceded your license limit? Easy wya to determine if this is the problem is stop the License Logging service and see if you still recieve that message.

Is it really a server, or might it be a workstation that's been given some server software? NT 4 is limited to 5 or 10 [i forget which] concurrent connections. If it really is a server, then someone set it up with a limited amount of licenses for connections, instead of per seat.

When the server is licensed "per server" you have to enter the number of licenses you purchased and you cannot go above that number. If you were to license per seat, it assumes you've got the licenses you need as you go, and there is less often a maintenance requirement - as far as licensing goes.

CAUSE
The licensing service is not releasing the licenses for RAS users after they hang up. Over time, depending on the number of licenses you have defined on the server, all of the licenses will be taken.
RESOLUTION
To correct this problem, change the licensing from "Per Server" to "Per Seat."

A Reboot will be an immediate temp fix, the above will resolve your problems.

This article was previously published under Q179483
SYMPTOMS
If you are using a computer that is running Windows NT or later, you may receive the following error message:

No more connections can be made at this remote computer at this time because there are already as many connections as the computer can accept.
If you are using a computer that is running Windows 95, you may receive the following error message:

This request is not accepted by the network. Try again later.
CAUSE
You may be attempting to connect to a share that is configured to allows a specific number of connections, and that number of connections has been reached. Check the properties on the share on the server.
RESOLUTION
If the specified number of connections has been reached, increase the user limit or set the value to "maximum allowed."
MORE INFORMATION
There are several other parameters that you can check when troubleshooting a problem with limited connections to the computer.
Verify that the computer is running a retail version of Windows NT or later. To verify this, check the Licensing tool in Control Panel and make sure that the following message does not appear:

Not available in NFR (Not for Resale)/MSDN Edition of Windows NT Server.
The server may be configured with Per Server licensing and the number of licenses may be exhausted. A quick check to see if this is the problem would be turn off the License Logging Service on the computer.
Check to see if the server was configured by upgrading a computer running Windows NT Workstation to Windows NT Server. If it was, the following registry parameter may need to be increased from a hex value of 0xa (10) to 0xFFFFFFFF:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanManServer\Parameters\Users

For additional information, click the article numbers below to view the articles in the Microsoft Knowledge Base:

122920 Inbound Connections Limit in Windows NT Workstation 3.5x & 4.0

I found this on Microsoft's knowledge base if you search on the error message. I have attached the link and pertains to NT 3.5 servers.

http://support.microsoft.com/default.aspx?scid=kb;en-us;122925

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