ADPREP unable to extend the schema during adprep /forestprep

Posted on 2009-12-31
Last Modified: 2012-05-08
I am trying to introduce a 2003 server into a 2000 domain  to replace the bdc which has died (cannot boot up at all). I am trying to run adprep /forestprep from the pdc.  I have verified that it is running all the fsmo roles and is the schema master.  I get the following message when running adprep /forestprep::

"The schema master did not finish replication after last reboot. The schema master must complete at least one replication cycle before the schema can be extended. Verify that the schema master is connected to the network and can communicate with other domain controllers. Use the Sites and Services snap in to replicate between the schema operations master and at least one replication partner.  After replication has succeeded, run adprep again."

I cannot replicate, as the other dc is dead.  Should I delete that server?

Question by:barleyfreak
    LVL 82

    Accepted Solution

    The dead DC has to be removed from AD:

    How to remove data in Active Directory after an unsuccessful domain controller demotion

    Delete Failed DCs from Active Directory
    LVL 5

    Expert Comment

    first remove the metadata properly from active directory by using NTDSUTIL  then try again.
    if still same error appears try switch

    adprep /forestprep /nofilecopy (some times this helps because PDC tries to copy db files of old 2000 dc in two locations and you can skip this safely.

    Expert Comment


    Perfect solution!!!. Really well documented.


    Featured Post

    IT, Stop Being Called Into Every Meeting

    Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

    Join & Write a Comment

    It is a known fact that servers reach the end of their lives. Some get there quicker than others, based on age, manufacturer, usage and several other factors. However, if your organization has spent time deploying Microsoft's Active Directory server…
    I guess it is not common knowledge to most Wintel engineers/administrators: If you have an SNMP-based monitoring system in your environment (and it's common to have SNMP or Syslog) it's reasonably easy to enable monitoring of the Windows Event logs,…
    This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor ( If you're looking for how to monitor bandwidth using netflow or packet s…
    Polish reports in Access so they look terrific. Take yourself to another level. Equations, Back Color, Alternate Back Color. Write easy VBA Code. Tighten space to use less pages. Launch report from a menu, considering criteria only when it is filled…

    729 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    19 Experts available now in Live!

    Get 1:1 Help Now