Can you please confirm whether or not Windows Server 2008 R2 domain/forest functional levels are supported?
解决办法
Officially, 2012 R2 domain functional level and lower are not supported. While it may work, the current stance is "use at your own risk". According to ODM AD document, 2016 and higher domain and forest functional levels are supported: On Demand Migration Current - Active Directory User Guide (quest.com)
