Hi Chris, As far as I know, your TSCAL license server needs at least to be the same OS as your Terminal Servers / Citrix Servers So Windows 2003 for Windows 2003 and Windows 2008 for Windows 2008 A TSCAL license server is however backward compatible, so it is for instance possible to issue TSCAL's for Windows 2000 from a Windows 2003 server Cheers, Ben ------------------------------ Msg: #4 in digest Date: Wed, 8 Dec 2010 15:57:55 +0000 Subject: [THIN] 2000 Terminal Server with 2003 CALS From: Chris Strug <chrisstrug@xxxxxxxxx> Greetings all, Was wondering if anyone could confirm something for me. We've an old Server 2000 based PS4.0 farm. The TS license server is 2000, likewise all Citrix servers are PS4.0 on 2000. We've found a need for a 2003 PS / XenApp server to be included in the farm - however I'm pretty convinced that the fact our TS license server is running server 2000 is going to prove a major sticking point as I don't believe that a TS license server on Windows 2000 can issue CALs for 2003 clients. Can anyone confirm this is definately the case? - I tried a quick Google but wasn't able to find anything conclusive... Thanks all. Chris************************************************ For Archives, RSS, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: //www.freelists.org/list/thin Follow ThinList on Twitter http://twitter.com/thinlist ************************************************