Can I build an Exchange server to run in parallel to my SBS with exchange on SBS disabled?

Hi,
Here is my problem. I have an SBS 2003 which is running at its maximum CALs 75.  Can I build an Exchange server 2007 and run it in parallel with my SBS sever with Exchange disabled until I am ready to move away from my SBS server completely?

Thanks
Sean
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SeanAsked:
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smckellar83Commented:
no, in an sbs environment the only extra servers you can have are member servers (terminal servers etc) and a backup dc (for a remote site to speed up authentication). Definitely not a second exchange server.
If you wanted you could build a compltely separate domain, that is in no way joined to the sbs domain (i.e. copy across user accounts - recreate them, or what til you are going to make the move and run ad migration tool)
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TG TranIT guyCommented:
It can be done but you need to conquer the SBS limitations:
1.  Need to make the new server DC
2.  Move Schema Master role to new server
3.  Satisfy  Exchange 2007 various prerequisites

Bottom line:  If you have 75 clients, time to move away from SBS!!!!!  Save you from grieves in the long run
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smckellar83Commented:
tqtran - surely ms do not support doing this?
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DrDave242Commented:
SBS will start complaining once you move the Schema Master role away from it.  I believe there is a grace period (possibly 14 days) during which it will operate normally, but you cannot move FSMOs away from SBS permanently, as one of its requirements is that it must retain all of the FSMO roles.
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TG TranIT guyCommented:
smvkellar83, of course not, but that has not stopped people from trying!
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DrDave242Commented:
I see that part 2 of that article has you moving the Schema Master role back to the SBS server...so it could work.  Never tried it myself, though.
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TG TranIT guyCommented:
You need Schema Master on new 64bit server so when you install Exchange, it can extend the schema.  After that, move it back.
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SeanAuthor Commented:
When we tired to upgrade our SBS  hardware ( move to a totally different server configuration ) there were a lot of naysayers including Microsoft. But guess what, we did without any major glitches.

Well folks its time to put Chirs Dalby's idea to a real test. I will let you know how things work out regardless of weather I am still employed or not.

Thanks tgtran I saw those docs also.
Thank you all
Sean
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