Windows Server 2008 RDS and Windows Server 2008 TS CAL Compatibility

Windows Server 2008 RDS and Windows Server 2008 TS CAL Compatibility

Rate This
  • Comments 34

In Windows Server 2008 R2, Windows Server 2008 TS CALs and Windows Server 2008 RDS CALs will be treated as equal in all respects. So, if a customer has a Windows Server 2008 TS CAL, it will allow the same functionality (connection, experience etc.) as a Windows Server 2008 RDS CAL.


Because they are compatible, you can install Windows Server2008 TS CALs on Windows Server 2008 R2 license server and Windows Server 2008 RDS CALs on Windows Server 2008 license server. Please note that in order to install Windows Server 2008 CALs on your Windows Server 2008 license server, you need to request your Technical Account Manager (TAM) or Escalation Engineer (EE) for KB 968074 and install it on the license server.


You can also issue a Windows Server 2008 TS CAL to a client connecting through Windows Server 2008 R2 Remote Desktop Server and issue a Windows Server 2008 RDS CAL to a client connecting through Windows Server 2008 Terminal Server.

 [April, 2010: Article edited to clarifying naming.]

Leave a Comment
  • Please add 6 and 5 and type the answer here:
  • Post
  • @bob: You need to purchase 5 CALs.

  • @B: It depends upon the licensing mode set on the Remote Desktop Session Host server. Depending upon the number of seats/devices or users - whatever is less, should be the number of CALs to be purchased.



  • 2008 R2 allowing just the admin TS connections.

    When a user logs on with TS is this logged anywhere so I can see the users computer name (that was used to connect) I need to know what admins log on? I can see the computer name in Task Manager (when the user is connected)

    Thanks in advance,


  • If I have Windows Server 2008 R2 with 5 CALS and I want to have 10 RDS users, do I have to purchase and additional 5 CALS and 10 RDS CALS? or Do I just need to purchase 10 RDS CALS?

    Thanks - John

  • @John: In all you need 10 RDS CALs. If you already have 5 RDS CALs then you just need to purchase 5 more. But if you have 5 lower version CALs then either you need to get these 5 upgraded and purchase 5 higher version ones or purchase 10 RDS CALs.

  • Is there a separation between RDS and the CALs that come with the Server OS?  if a server OS comes with 5 CALs are and I want 10 RDS CALS, do I need to purchase 5 Windows CALs in addition to the 5 that came with the server purchse to match the 10 RDS CALs?  Thanks.

  • From what I gather, you need to purchase 10 RDS CALS and another 5 user CALS.

    I think the RDS CALS are the ones that are required to log in via RDS but the user CALS are not entered anywhere and are more so you comply with the licensing agreement.  If you dont have them, everything will still work but you will be breaking the EULA.

  • Hi,

    We have a win 2k3 terminal server which we using for a long time, now we set up a new RDS license and planning to let win2k3 ts to get license from Win 2008 R2 RDS license server. Is that possible? Can a win2k3 ts use a win2008 rds cal from wind 2008 R2 RDS license server?


  • WoW................interesting blog.i like it............

  • All this is truly mind numbing. Who thought all this up? It is now looking like a full time occupation to set up TS where it used to take only a couple minutes.  I can't believe you guys.

  • Is it correct that i can only see the hotfix being for Vista ?

    I have a 2008 SBS premium with 2008 STD installed on a VM to run TS.

    I cannot add the RDS User CAL's as i cannot get the RD License Service to work.

    Only have the TS license service.

    After searching i came here, to my surprise i only see that it applies to vista ?

    Can u confirm to that its correct and working for 2008 or did i receive the wrong hotfix ?

  • If we only have 10 users out 15 connected at the same time, we dont need 5 more cals, do we? We have a 10 user cal already installed on the terminal server. We never have more than 10 domain users connected at the same time to the terminal server.

  • Can anyone tell me where I can purchase 10 RDS User Cals for Microsoft Server 2008? I contacted Microsoft originally and they sent me Windows Small Business Server 2008 Cals Suite which didn't work. Our server was set up with the 120 day trial bases and has expired so I need to purchase licenses. When I called Microsoft for an exchange they told me the RDS user Cals that I originally wanted are out of stock and I have to purchase them from a reseller. Problem is, due to Microsoft's mistake I've lost a day of shipping and I need the Cals overnighted. Any suggestions??

  • I built a Windows Server 2008 R2 system with the intent of having a few people access it through remote desktop (max 4).  I purchased CALs but apparently I purchased 2008 TS CALs.  It sounds like from the opening paragraph that I can still use them but doesn't say how to install them.  First, can I use them like RDS CALs?  Or do I have to purchase RDS CALs for what I want to do?  Thanks.

    inbox.chi at gmail dot com

  • Puede instalarse en un Windows Server 2008, tanto las licencias CAL de TS y las licencias CAL de RSD?

Page 2 of 3 (34 items) 123