Hello, i am currently trying to update our exchange environment from 2010 to 2013 and attempting to install our first 2013 mailbox role. All our existing exchange servers are 2010 sp3 update roll up 5 and i am using exchange 2013 cu8 for the 2013 install.

I have completed all the prerequisites sucessfully i.e prepareschema preparead and preparealldomains. Exchange 2010 is currently installed in a child domainI monitored the forest replication status for any issues after each command and had no problems.

I have checked the various ADSI attributes to confirm the appropriate changes.

The problem i having each time i run the setup the prereq check fails with the following error

The local domain needs to be prepared using Setup PrepareDomain before server roles can be installed

and the error below appears in the setup logs

Failed Rule Domain PrepRequired Message The local domain needs to be prepared using Setup PrepareDomain before server roles can be installed.

But like i say this has definitely been done.

Additionally if i run the setup in the root domain the prereqs pass and it would allow me to install exchange.

Does anyone have any idea what the setup is actually checking for? or any ideas how to get past it or what exactly might be going on?

Thanks

• Edited by _CRK_ Thursday, May 21, 2015 8:05 AM

Hi, i have tried this, I even moved the schema master to the child domain and run all the commands again but this has still not resolved it?

Thanks