The syntax of the command is: adprep option Supported : /forestPrep Update forest information Must be run on the schema role ...

The syntax of the command is:

adprep  [option]

Supported :
/forestPrep             Update forest information
                        Must be run on the schema role master

/domainPrep             Update domain information
                        Must be run on the infrastructure role master
                        Must be run after /forestPrep is finished

/domainprep /gpprep     Update permissions on Group Policy Objects in
                        Active Directory Domain Services and SYSVOL
                        Must be run on the infrastructure role master
                        Must be run after /forestPrep is finished

/rodcPrep               Update permissions on NDNC partitions to 
                        enable replication for Read-only Domain Controllers. 
                        Runs remotely and contacts a NDNC replica to update 
                        permissions. Must be run after /forestPrep is 
                        finished. Can be re-run at any time. You should run 
                        this in particular when you have DNS application
                        partitions in your forest.


Supported [option]:

/noSPWarning            adprep will suppress the Windows 2000 service 
                        pack 4 requirement warning during /forestprep

/silent                 adprep will suppress all output.