Unable to replicate the attributes of AD to SPO via AzureAD

Question

I am trying to sync a custom property which is created in AD with SharePoint Online User Profiles. I want to understand that while it is synced from AD to Azure AD, and while it is synced from Azure AD to the SPO directory, it is NOT replicated to the User Profile application.

Can anyone tell me the possible reason for the following? Where am I missing?

Answer 1

By default user profile synchronization in SharePoint Online synchronises only few standard set of properties. Custom AAD Properties are not synced to SharePoint online User profiles by default/OOTB synchronization mechanism.You can see more details & the list of properties here. Below is an excerpt from the link.

Q4.Why isn't it possible to map additional properties for AD Import to sync from Azure Active Directory to the User Profile Application?

A4. AD Import is limited to a preconfigured set of properties to guarantee consistent performance of the timer job.

You have to develop a custom user profile sync tool to sync your custom properties. You have two options to consider while developing the tool:

1. Use the API for Bulk Updating Custom User Profile Properties for SharePoint Online. See here for info

2. You can use the Azure AD to User Profile Sync Tool developed by PnP team for this.