SBS secondary domain installation

Hi, we currently have sbs 2011 std and we want to install a secondary or additional domain controller on server 2012. Is it good to install secondary domain on server 2012 in sbs 2011 environment?
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Cliff GaliherCommented:
Yes. Users will require 2012 CALs in addition to SBS CALs though. Be aware of that expense.
Aussy99Author Commented:
Are you sure about CAL's because we never heard or used CAL's when did secondary addition from 2012 to 2012, it never even asked to add any CAL's either.
Cliff GaliherCommented:
Yes, I am sure. SBS CALs are required in an SBS environment. And SBS 2011 CALs only cover additional 2008 R2 and older servers. This is not dissimilar to introducing any other new version into an older environment. If all your servers were 2012 R2, and you had 2012 CALs, your first 2016 server would require purchasing 2016 CALs too.  Older CALs have never covered newer server versions.
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Aussy99Author Commented:
Reason I asked is because we already have 3 servers with 2012 working in the environment and we were planning to make one of them a secondary domain controller.
Cliff GaliherCommented:
Then unless you have 2012 CALs, chances are you've been in an illegal state for some time already.
Aussy99Author Commented:
The question was different and you have taken it into different direction and well the question still remain unanswered.
Cliff GaliherCommented:
My first reply answered the original question with an additional explanation. You have then been asking follow-up questions, which I have also answered. The original question WAS answered. I didn't take anything in a different direction.
Cris HannaSr IT Support EngineerCommented:
Cliff has answered your question and he's shared additional information because it's important
Cliff said "Yes. Users will require 2012 CALs in addition to SBS CALs though. Be aware of that expense."

When you perform actions on a server or your network, it doesn't always stop with the just the action your planning to do and that's what Cliff was trying to help to make clear

So just to reiterate.
Yes you can install an additional dc in an SBS domain.   Should the SBS box be down for some reason, users will still be able to logon
You'd probably want to make it a DNS Server and GC server as well and DHCP (though not started) or it won't be of much value should the SBS box go down   But you will NOT be able to appropriately add users or other functions that are done in the SBS Console

And you will not have Exchange for email.

So an additional DC in an SBS Environment is possible and will provide some limited value.

Now...With your SBS came with 5 Client Access licenses.   If you have more than 5 users or computers (depending on your licensing model), you would require purchasing additional SBS Cals.    If you did not do that, then, as Cliff appropriately pointed out, your out of compliance from a licensing standpoint if audited and that can be very costly.    For connecting to additional servers in the network, the servers would have to be Server 2008 or Server 2008 R2 to be covered by the SBS 2011 CAL's

You stated that you have 3 Server 2012 servers in your network already.   Cliff appropriately pointed out that you should have purchased Server 2012 CALs for each user or computer (again depending on your licensing model) connecting to those 2012 servers, in addition to the correct number of SBS 2011 CAL's.   Failure to do so leaves you in a non-compliant state from an license audit standpoint.

So Cliff

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Cris HannaSr IT Support EngineerCommented:
The points should not have gone to me alone.   Cliff provided the answer in his first post.
You seemed to be getting confused by the additional, necessary information Cliff was providing, so I simply restated what Cliff had already pointed out
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