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Azure AD Connect -- Attribute Value Must Be Unique
-- Updating from my previous message -- I managed to get syncing attempts happening by removing the group filter. As my test group, I made a special OU for the test user and am applying the sy...
Fixed this item.
The issue was the test account (my account) was a Global Admin in AzureAD. I needed to demote the account to user account first, make the sync, and then re-enable global admin for my account.