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Schema downgrade is not supported.<br />
Once the Active Directory Schema has been extended with the OCS 2007 Schema Prep there isnt an option to un-extend the Schema nor any way to remove the extensions added.<br />
The only way to get back to a pre-OCS 2007 state would be to restore the Active Directory Schema to a state from before the OCS 2007 was installed.<br />
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Schema downgrade is not supported.
Once the Active Directory Schema has been extended with the OCS 2007 Schema Prep there isnt an option to un-extend the Schema nor any way to remove the extensions added.
The only way to get back to a pre-OCS 2007 state would be to restore the Active Directory Schema to a state from before the OCS 2007 was installed.



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We had installed OCS 2007 in our 2000 native AD environment, but did not like it and decided it to remove it, uninstalling it and unprep forest and unprep domain.<br />
We are trying to install LCV 2005 and it error out on forestprep with failure 0x80070057 - the parameter is incorrect. How can I get this fixed? Thanks
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We had installed OCS 2007 in our 2000 native AD environment, but did not like it and decided it to remove it, uninstalling it and unprep forest and unprep domain.
We are trying to install LCV 2005 and it error out on forestprep with failure 0x80070057 - the parameter is incorrect. How can I get this fixed? Thanks

Problem installing Live Comm 2005

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.