You are the Office 365 administrator for your company. The company synchronizes the local Active Directory objects with a central identity management system.
The environment has the following characteristics:
Each department has its own organizational unit (OU).
The company has OU hierarchies for partner user accounts.
All user accounts are maintained by the identity management system.
You need to ensure that partner accounts are NOT synchronized with Office 365.
What should you do? allows you to filter out objects that should not be synchronized to the cloud. The objects that can be filtered are:

A.
Configure OU-based filtering by using the Azure Active Directory Sync tool.

B.
In the Azure Active Directory portal, configure OU-based filtering.

C.
Configure user attribute-based filtering by using the Azure Active Directory Sync tool.

D.
In the Azure Active Directory portal, configure user attribute-based filtering.

Explanation:

You can use the Azure Active Directory Sync tool to enable Active Directory synchronization filtering. This
Organizational-units (OUs), domains, and user-attributes.