LDAP sync

[Hyien]

how do i filter ldap user sync by ldap group and assign those accounts to a proxmox group?

i have the following set:
User Filter: memberOf=cn=MyProxmoxUsers,ou=Groups,dc=example,dc=com

but it's not working. without the filter, i'm able to list all the users, so i can confirm ldap sync is working in general.