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Exchange 2007 SCR cluster across Multiple AD Sites.

We currently have an Exchange 2007 SP3 CCR setup in one site.  I am trying to add a SCR Exchange node in a different site.  I have added the SCR node to the failover cluster.  However, when I try to install Exchange 2007 SP3 on the SCR node with the "Passive Clustered Mailbox Role." I get the error:  This cluster spans multiple Active Directory sites.  Exchange 2007 cannot be installed.

How do you get a standby passive cluster node installed on a server in a different site?

Thank you in advance.
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Adam Brown
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Seems you did not prepare domain and forest with SP3 installation file.

Please extract Exchange server 2007 SP3 setup and run setup.com /preparead and setup.com /preparealldomains. then wait for get it replicated (usually wait for at least 2-4 hours) and try installation.
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Cappper

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@acbrown2010. Yes.  That is, actually, how I had it originally configured.  But I could not find a good document on how to recover a Stand-Alone Exchange server that is not clustered.  My plan was to rebuild it as a passive cluster node, so once the storage groups were prepared for mounting, I could simple use a command such as: setup.com /RecoverCMS /CMSName: /CMSIPAddress: to recover.  Then just mount the databases.

So if you have a good method for recovery a non-cluster SCR than let me know.  Because adding the already seeded databases, to a storage new storage group on the Standby Server, was a hurdle.

@Amit Kumar Goyal.    Please see attached.
setup.JPG
@Cappper

I would advise you to upgrade to Exchange 2013. DAG is much better compare to SCR.
Sorry my bad actually command is setup.com /preparead /OrganizationName:"<organization name>"

but here you already said that you have lost SCR copy in this site, so follow this article to recover SCR