Terminal Server Licensing Question?

I am setting up a new Windows 2008 Terminal server , when I specify license mode, should I chose per device or per user mode ? Why?
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hello 355LT1!

I think I can help you with this.  Please always consider your MS representative the only real authority on licensing issues.  That being said, please read my summary and additional sites to answer your question.

I found a good summary on Wikipedia:
Per User vs. Per Device:
CALs apply to either a "device" (as defined in the license agreement) or a "user". A business is free to choose either mode. In Per-User mode, a CAL is purchased to allow one user to connect to the server software. Any user can connect, but only one user may use a given CAL at any given time. Any number of CALs can be purchased to allow five, five hundred, or any number of users to simultaneously connect to the server. Any number of devices may connect to the server software, but only a set number of users can connect to it at once.

Per-Device mode operates in much the same way, but limits connections made by devices, rather than users. One CAL enables one device to connect to and use the server software, regardless of how many users are connecting.

Although User and Device CALs are the same price, they may not be used interchangeably, and cannot be switched without buying new CALs.

Additional references:
* http://technet.microsoft.com/en-us/library/cc754746%28WS.10%29.aspx
* http://www.microsoft.com/licensing/about-licensing/client-access-license.aspx
* http://www.microsoft.com/windowsserver2008/en/us/licensing-faq.aspx#termserv
* http://www.microsoft.com/windowsserver2008/en/us/licensing-terminal.aspx


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Darius GhassemCommented:
You need to decide which one you want to use. You should have purchased TS CALs that have a device or user based license. Device CALs are best used when you have multiple users running on one device. User CALs are used for any other scenario
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355LT1Author Commented:
I have user accessng one terminal server , but I was told per device is not good to use if sessions do not disconnect properly, I am still unsure what to use.
It is based on what was purchased, but per user is significantly better because each suers is given a token, and then it is released after they disconnect - tokens based upon licensing.  The per device means that the first devices that connect receive the token, but only those devices, or PC's, can connect after the licensing tokens have been distributed.  
Darius GhassemCommented:
Not true Terminal Server is not a concurrent license. Each User or Device that connects to the Terminal Server is given a TS CAL that TS CAL is not remove it is permnant with that user or device.

So, if you have multiple users working on one computer (desktop) then device CAL is better since mutiple users can logon and use the same TS device CAL. If you don't have multiple users working on one computer (desktop) then you should go with User CALs since you would not get an advantage of having multiple users using one TS CAL.

Again for each user or device connecting to the TS server you need a TS CAL for so if a user connects once they one if your TS CALs are gone it isn't coming back.
My point exactly - if there is any type of equipment change, or users remoting in after hours or days off then per user is the best choice.
Darius GhassemCommented:
What I got from your post is that once a user logs off the TS Licensing server gets the TS CAL back which is not correct once licenses is given to the user or device it does NOT come back to the TS Licensing Server unless you revoke the license which you can only do for 20% of your TS CALs
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