unwanted Active Directory users synchronized to Office 365 portal

Dear Community members,

I can see a lot of  users synchronized  from my Active Directory to Office 365 Portal Active Users list.

Before Centrify we have tried Azure AD Connect, it is stopped few weeks ago. 

I actually need only few of  my AD users in Office 365 portal. I have add them in Centrify Cloud Manager - Roles - Office 365 Role - Members page. But a lot of unwanted users are still listed on Office 365 portal page. 

How can I remove those unwanted AD users from Office 365 Portal Active Users list?

Thank you in advance!