The Exchange organization does not support this version of exchange - EXCHANGE 2010 on 2008 R2

Hi,

I am currently trying to install 2010 exchange on 2008 R2 after an unsuccessful run with 2013 install.

I am getting this error with the readiness checks. 

I have uninstalled 2013 exchange and removed the folders in /Program Files but it seems that it is still picking up the 2013 install.

Is there something in AD that i need to delete so it forgets about 2013? 

April 3rd, 2015 7:13pm
Once you run the Schema and AD preps for 2013 you can't install any lower rev exchange servers in your environment.  It is not supported/recommended to manually remove the changes done by those steps.
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April 3rd, 2015 11:50pm

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