Upgrading Exchange 2007 SP1 to SP3 when Exchange 2007 sp1 server in child domain

I need to upgrade a single Exchange 2007 SP1 system to SP3.
I understand i need to run setup /prepareschema 32bit on my schema master in the parent domain.
But do i also need to run  setup/prepareAD and setup /preparedomain in the parent domain and the child domain?

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Paul TozerCommented:
In the technet article it does state:

You must prepare Active Directory and each domain before you perform the first installation of Exchange 2007 SP3 in an organization.

As there are schema changes for attributes that are part of Exchange (Although most are UM) you may run into issues if you don't, such as routing of mail between domains.
Rbauckham69Author Commented:
Ok Thanks

So i ned to run Setup /prepareschema , /prepareAD in the root / parent domain

and setup /preparedomain in the child?

Is that correct

Paul TozerCommented:
Yes that is correct, you can run setup /preparealldomains if you have multiple subdomains to save time.

It is documented here: http://technet.microsoft.com/en-us/library/bb125224.aspx 

Just follow steps 2-4

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Rbauckham69Author Commented:
I have prepared Root domain. Now the setup /preparedomain in the child domain.

I tried to run on DC but seems to want dotnet, powershell etc

Can i run this from exchnage server?
Rbauckham69Author Commented:
done...all looks good

many thanks.#

Hopefully the SP3 will run ok now
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