Exchange PrepareAD


If you can remember back when you built you Exchange environment, you ran setup /PrepareAD and you may or not have noticed this message:

Setup will prepare the organization for Exchange 2013 by using 'Setup /PrepareAD'. No Exchange 2010 server roles have been detected in this topology. After this operation, you will not be able to install any Exchange 2010 servers.
For more information, visit:

Now if you forgot about this, your are screwed. In this case I would not be able to install any Exchange 2010 in the future.

Wouldn’t it be nice if Microsoft made you press any key or something, so if you have a DOH! moment you can fix things?!

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