IdFix Schema warning about attributes not marked for replication in GC

Hi,

I have 4 Windows Server 2016 domain controlers each with Global Catalog, 2 DC in a site and 2 others in another site.

AD and Forest are Windows Server 2016 level.

I need to connect my AD with Azure AD, so I launched IdFix to be sure my AD is clean.

But the following message appears when I try to query :

"The following attributes are present in the schema but are not marked for replication to the Global Catalog and will not be analyzed for errors : homeMdb and mailnickname"

After a search, I found this link : https://www.ntweekly.com/2017/10/12/add-attributes-global-catalog-server-windows-server-2016/

But the 2 attributes are checked for "Replicate this attribute to the Global Catalog".

I'm lost , somebody help me 🙂