I may be missing something here, but if the client is connecting to their own Terminal Server, they've already (in theory) obtained a TS CAL. Ask Microsoft. Then ask again and see if the answer is the same. _____ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Joe Shonk Sent: Tuesday, December 11, 2007 4:24 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] Re: nested terminal server Multiplexing connections is a tricky issue. The best answer is to ask Microsoft but I would say that as a service provider, you will need a license for each device (not TS but the actual client device) or user that connects to your. Using hardware or software to multiplex connections in order to save on licensing is typically a no-no. Just like SQL licenses, if your Presentation Server uses a SQL server then every device or seat that connects to PS also requires a SQL license. The alternative is to license SQL per processor. TS has a similar type license. Joe From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Jason Patten Sent: Tuesday, December 11, 2007 1:41 PM To: thin Subject: [THIN] nested terminal server Quick question I have a client who wants to put the Citrix client on their Terminal server and serve out the client via terminal server sessions to allow access to our citrix servers. If they do so, does Each terminal server session they open and then connect to our citrix box consume a separate TSCAL from our system? Or is only one taken by the terminal server box no matter how many sessions are launched. Basically they will be nesting the citrix session to Our farm inside a terminal server session from their TS box