Hi Srijith Jayarajan,
Thank you for posting in the Microsoft Community Forums.
"ERR2: 7422" indicates that migration fails when ADMT attempts to migrate an object with child objects.
For example, if object A has a child object B, then object A cannot be migrated directly, resulting in the error. The child objects (also known as leaf objects) must be deleted before the parent object can be migrated.
You need to find the parent object pointed to in the error message and delete its child objects completely before attempting to continue the migration.
There is a related reference document here that explains the error.
Support policy and known issues for ADMT - Windows Server | Microsoft Learn
Kind regards
Neuvi Jiang
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