Hello,
Thank you so much for posting here.
According to the document, "After you know which groups have LEGACY members, convert those members from LEGACY to PRESENT by removing them from the group and then adding them back in."
So we need to remove the members from the group first and then add them back in. The values previously marked "LEGACY" are then marked "PRESENT". The attribute will now take advantage of linked value replication.
Here is more document for your reference:
https://social.technet.microsoft.com/wiki/contents/articles/32132.active-directory-allow-linked-multi-valued-attributes-to-use-lvr.aspx
Best regards,
Hannah Xiong
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