O365 throttling

Hi all,

I will be migrating 100's of users over to Exchange Online over the next few months. The ones I've completed so far took a very very long time to migrate and I think it;s because of the throttling that MS apply to O365 tennants.

Via the Microsoft 365 admin center I have lifted the EWS throttling for 90 days but my question is, does NME use EWS? Will the change I made in the admin center make any difference or do I need to log a support ticket with MS to have another kind of throttling lifted?