Exchange 2007 SP2 Upgrade Error in PrepareSchema command

I'm trying to make sure my domain can handle the upgrade to Exchange Server 2007 SP2 in preparation for transitioning to Exchange Server 2010 in the next few months.  When I run the Prepare Schema command, I get the following.
setup /PrepareSchema

Welcome to Microsoft Exchange Server 2007 Unattended Setup

Preparing Exchange Setup

Exchange Server setup encountered an error.

Event Viewer shows that the Schema checks for the AD servers on the domain.  Then the process stops. There is no other information available.

Anyone have any insight?
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MegaNuk3Connect With a Mentor Commented:
Go straight to Exchange 2007 SP3
Does this apply to you at all I have run into it before.
TereciaBurgessAuthor Commented:
Steinmto, The Exchange server can see the schema for the DC.  So this is not the issue.

Meganuk3, I'm trying to get to Exchange 2010.  I'd rather not have to make the transition to Exchange 2007 SP2 at all.  However, the Exchange 2010 installation best practices reported that I needed to upgrade the Exchange server to SP2.  Slao, I still have to prepare the domain, so I'm not any better off skipping SP3.
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Viral RathodConsultantCommented:
TereciaBurgessAuthor Commented:
MegaNuk3 - Found something that makes me want to skip SP2 altogether - Mode:Upgrade is an option in SP3.  I'm going to try this and will get back to you all after this weekend.
TereciaBurgessConnect With a Mentor Author Commented:
Hey all, I got is worked out.  Meganuk3 's suggestion to jump right to Exchage 2007 SP3 was the way to go.  For those who want more details:
use the command line mode for running the upgrade as it handles the domain prep for you.
1.At a command prompt, connect to the AMD64 or I386 directory of the Exchange 2007 SP3 media location.

2.Run /mode:upgrade. Accept all default options when you perform the steps from the command line.

Thanks for the points
TereciaBurgessAuthor Commented:
My solution has the technet for background and the directions to install SP3 using the Command Line mode.
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