Failed to save dynamic group. Dynamic membership rule validation error: Unsupported property.

Question

Hi All
I am using hybrid environment, I am trying to create a dynamic security group from Azure Active Directory. i am using the below query
(user.departmentNumber -eq "10") or (departmentNumber -eq "11"). i am getting the error Failed to save dynamic group. Dynamic membership rule validation error: Unsupported property. i can see that department number is synchronized from onprem but not sure it works in Azure AD.

Answer 1

The list of attributes supported for dynamic membership rules is here: https://learn.microsoft.com/en-us/azure/active-directory/users-groups-roles/groups-dynamic-membership
As you can see, departmentNumber is NOT a supported one.