Microsoft has released various versions of the Active Directory Migration Tool (ADMT) in the last couple of years. With it, you can migrate user accounts and groups from one domain (the source domain) to an Active Directory target domain.

However, when looking closer at the various versions of ADMT, you’ll notice that Microsoft has not quite added features to ADMT, but instead specifies the versions of the source and target domains supported. While small bugs have been fixed in ADMT since version 3.0, the support Matrix for ADMT is the biggest differentiator between the ADMT versions released.

When you’re faced with an environment that is not going to a supported version for the platform, anytime soon, or an environment where you’re not allowed to make any significant changes, you might opt to use an older version of the Active Directory Migration Tool (ADMT).

Note:
Today, all versions of the the Active Directory Migration Tool (ADMT) below version 3.2 are deprecated. This, however, does not mean they are unsupported.

Supported Source Domain Controllers

The table below shows the supported Windows Server versions for Active Directory Domain Controllers in the source domain, per ADMT version:

Note:
When migrating cross-forest, the Domain Controller used in the source domain is always the Domain Controller holding the RID Pool Master FSMO role.

Supported Target Domain Controllers

The table below shows the supported Windows Server versions for Active Directory Domain Controllers in the target domain, per ADMT version:

Supported Operating Systems for Installation

The Active Directory Migration Tool (ADMT) needs to be installed on a Windows Server installation. The table below shows the supported Windows Server versions as the host running ADMT, per ADMT version:

Supported Operating Systems for Migration

The Active Directory Migration Tool (ADMT) can migrate domain-joined devices and member servers from the source domain to the target domain. It will migrate service accounts, managed service accounts (MSAs) and user rights assignments during this process. The table below shows the supported Operating Systems for this functionality, per ADMT version:

Note:
ADMT 3.2 upgrade supports all supported Windows versions, but was released when Windows XP was still supported.

Concluding

Choose the version of the Active Directory Migration Tool (ADMT) using the tables containing the supported source Domain Controllers, target Domain Controllers and supported Operating Systems for device migration. Then, install the Windows Server version supported for installation of ADMT.