Maximum amount of RDP connections problem



When I connect more than 16 RDP clients simultaniously to a Windows
2000 Terminal server, I get the following error message:

The client could not establish a conection to the remote computer

The most likely causes for this error are:
1) Remote connections might not be enabled at the remote computer
2) The Maximum number of connections was exceeded at the remote
3) A network error occurred while establishing the connection

The maximum amount seems to be reached and seems to be only 16! There
are enough licenses installed on this server so this is not the
Does somebody know how I can change this 'maximum amount' or in what
diretion to search for the problem?

Help would be very appreciated!!

Kind Regards,


Most of the time there are no errors in event log, but sometimes an
error and a warning are reported in the event log.
The warning occurs at the time of the problem, the error happened at
some other time.
Like I said, there are more then enough licences installed.

Event Type: Warning
Event Source: LicenseService
Event Category: None
Event ID: 221
Date: 1/16/2006
Time: 9:40:09 AM
User: N/A
Computer: RSV-TS-01
License usage for product TermService 5.0 is nearing the maximum number

of per server licenses purchased. Consult License Manager from the
Administrative Tools folder for more information.

Event Type: Error
Event Source: LicenseService
Event Category: None
Event ID: 201
Date: 1/13/2006
Time: 11:51:00 AM
User: N/A
Computer: RSV-TS-01
No license was available for user SYSTEM using product TermService 5.0.

Vera Noest [MVP]

OK, this has nothing to do with TS CALs, this is a problem with
server CALs!

You can either disable the licensing logging service completely, or
start the Licensing Applet (in Control Panel), and make sure that it
lists the correct number of server CALs that you purchased.

Note that the server is licensed in the Per Server mode. If you have
more than a single server on your network (like a DC and a TS), this
is *not* the bbest licensing mode!
Changing to Per Seat licensing will solve your problem, but you have
to ensure manually that you have a server CAL for every device.

Vera Noest
MCSE, CCEA, Microsoft MVP - Terminal Server
TS troubleshooting:
SQL troubleshooting:
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