1. The DC is divided into five OM, each has its own use, Schema Master, Primary Domain Controller Emulator Master, Domain Naming Master, Relative Identifier Master, and Infrastruture Master. Usually, if there is no manual conversion, the five OM defaults to the first DC. For your situation, you must first determine that the headquarters' DC is the first DC (of course, most cases), yes, first do the five OM transfer, first transfer OM to other DC, then heavy The headquarters DC, otherwise there is a problem like the DC after installation, and the forced conversion of the OM role is as follows:
First determine which domain controller USN is up-to-date, assuming that there are three domain controllers AD domain names a.abc.com, b.abc.com and c.abc.com, where B.abc.com crashes, enter the following command :
Repadmin / showvector DC = ABC, DC = COM a.abc.comrepadmin / showVector DC = ABC, DC = COM C.ABC.com
These two commands show the USN of B.Abc.com, write that digital, the same operation on all DCs, find the highest number, this is a machine that is suitable for OM.
Then install the tools in the Support Tools of 2K dish, then enter the following command:
NTDSUTILROLESCONNECITONSCONNECTE TO Server I have just found DC domain Quitseize OM Name Quitquit
OK.
2. If the DNS primary server is on the headquarters DC, the machine is now broken, and the secondary server cannot be installed on other DCs. If the AD integration is integrated, since the DNS domain data is integrated into an object in the AD, the DNS data is not damaged, and if the DNS is installed on other DCs, the original data should be obtained.
3. Of course not. Enter DCPROMO on DC to exit the AD, then follow the wizard, you can downgrade. For your situation, when reinstalling the headquarters DC, the name of the headquarters DC can be the same or different, the processing method is different, if the name is the same, then delete the DSA object of the original DC, the process is as follows: NTDSUTILMETADATACLEANUPCONNECTIONSCONNECTE TO SERVER Other DC Domain Name Quitselect Operation TargetList DomainSselect Domain AD Domain Number List Sitesselect Site headquarters Name The number of Site points List Servers In SITESELECT Server Headquarters DC number Quitremove Selected Server This time a message, determine. Quit.
If the name is different from the original, the following steps are required: 1. Delete objects related to headquarters DC in the Active Directory site; 2. Remove computer objects related to headquarters DC in Active Directory users and computers, such as computer accounts, and the like.
