SharePoint Managed Property Online Search Issue – Custom User Profile Property

Because default profile properties work while only the new property returns null, verify the profile property and mapping. In SharePoint admin center, open More features, User profiles, Manage User Properties, edit the custom property, and confirm Indexed is selected under Search Settings. Confirm the value was written to the SharePoint user profile; custom Microsoft Entra ID properties do not automatically synchronize into SharePoint. Next, inspect the search schema for the crawled property after a profile has been processed. Map it to an unused managed property that is Queryable and Retrievable, then query the People search source rather than a content-only source. Test a user and request a built-in profile property beside the custom managed property. Reindexing cannot populate a missing source value or correct a mapping to the wrong crawled property. If the crawled property never appears, open a Microsoft 365 support request with the property name and test user.