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Continue to ChatExtending Azure AD Schema via Graph API - The n00b Guide https://www.idampundit.com/2017/05/extending-azure-ad-schema-via-graph-api-n00b-guide/
Extending Azure AD Schema via Graph API - The n00b Guide https://www.idampundit.com/2017/05/extending-azure-ad-schema-via-graph-api-n00b-guide/