Hello,
Thank you so much for posting here.
The administrator credential is not required if SIDHistory is not migrated. While it will be required if we migrate the SIDHistory.
The basic requirements for inter-forest migration operations are:
Wizard-based basic user and group account migration without sIDHistory
The source domain must trust the target domain.
The user account that is running ADMTv2 must have Administrator rights in the source domain.
The ADMT user account must have delegated permissions to create user or group objects in the target container.
DNS (hostname) and NetBIOS name resolution between the domains must exist.
sIDHistory migration requires the following additional dependencies
Success and failure auditing of account management for both source and target domains.
Source domains call this user and group management auditing.
An empty local group in the source domain that is named {SourceNetBIOSDom}$$$.
The HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\LSA\TcpipClientSupportregistry key must be set to 1 on the source domain primary domain controller.
You must restart the source domain primary domain controller after the registry configuration.
Windows security requires user credentials with the delegated MigratesIDHistory extended right or administrator rights in the target domain. You add these credentials in the wizard when sIDHistory migration is turned on.
For more information, we could refer to:
Hope the information is helpful. Thank so much.
Best regards,
Hannah Xiong
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