Migrate Hybrid to Online with no on-premise environment

I've ran into an issue whilst migrating to Office 365, specifically Skype.

There was previously an on-premise Skype setup, Office 365 was procured and the migration started.  A number of pilot users were moved across who now show as 'Online' whilst everyone else shows as 'Online (hybrid)'.

Through miscommunication and a complete misunderstanding, the on-premise Skype environment was fully decommissioned, including all DNS changes etc. within a week whilst i wasn't in the office.

This means we have a bunch of users still showing as 'Online (hybrid)' and every subsequent new user also has a status of hybrid.

Is there a way to force the existing users and any future new user to be 'Online' only?