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Didn't know that, so OK....so ideas on how to uninstall from a partially installed R2 version?
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Didn't know that, so OK....so ideas on how to uninstall from a partially installed R2 version?

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I have a clustered (CCR) 2007 SP1 environment and a test mailbox server on my network. I was trying to build a new test mailbox server on 2008 R2 instead of 2008. The mailbox role would not install and gave me some errors and now will not uninstall. The error that pops up is either <br />
<br />
Cannot calculate value of property &quot;AdminDisplayVersion&quot;: &quot;SerialNumber property is not present.&quot;<br />
<br />
Or when trying to reinstall the mailbox role, I get a message of:<br />
<br />
Exchange Server component Mailbox Role failed. <br />
Error: Error:<br />
An error occurred. The error code was 3221685466. The message was The service is already registered.<br />
<br />
Ideas on how to get it gone altogether, properly? I know I can just kill the server and try ADDSI Edit and see if I can find the stuff in AD to rip out, but eventually I do want to have an 2008 R2 server as a test mailbox server.
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I have a clustered (CCR) 2007 SP1 environment and a test mailbox server on my network. I was trying to build a new test mailbox server on 2008 R2 instead of 2008. The mailbox role would not install and gave me some errors and now will not uninstall. The error that pops up is either 

Cannot calculate value of property "AdminDisplayVersion": "SerialNumber property is not present."

Or when trying to reinstall the mailbox role, I get a message of:

Exchange Server component Mailbox Role failed. 
Error: Error:
An error occurred. The error code was 3221685466. The message was The service is already registered.

Ideas on how to get it gone altogether, properly? I know I can just kill the server and try ADDSI Edit and see if I can find the stuff in AD to rip out, but eventually I do want to have an 2008 R2 server as a test mailbox server.

Exchange 2007 SP1 mailbox installation issues on 2008 R2

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.