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Before changing the schema of a domain (AdPrep), it is recommended to solve all connectivity errors in the domain. With this in mind I would demote the old DC first and verify that all replication errors (dcdiag is your friend here) are gone before running any schema updates. >>> On 7/27/2009 at 10:25 AM, Jesse Howard <[log in to unmask]> wrote: > I have an old domain controller that has been having DNS and replication > errors for some time now. The PDC in the domain was recently brought up to > windows 2003 server service pack 2, and now replication with the failing DC > is completely gone. The current PDC is holding all FSMO roles. My question > is; can I safely ADPREP the domain, DCPROMO a new DC (2003 R2), and then > demote the old DC that can't replicate? > > > > Thanks, > > Jesse Howard > _______________________ > > IT Administrator > Michigan State University Press > <mailto:[log in to unmask]> [log in to unmask] > <http://www.msupress.msu.edu/> www.msupress.msu.edu > > > >