We need to change e-mail domain for 550 of our 700 licensed users. How?

Dear Zoom Community.

We have 700 users set up with Single Sign on, validated through their e-mail.

Due to Restructuring we need to change e-mail domain for 500 of the 700 users.

Now, i can change on a user manually, but im restricted to only 3 changes in 24 hours. Is there a way to do this? If they just log in with SSO it creates a new user object and they lose all their History and syncs, furthermore we dont have enough licenses to cover duplicates of all the users.

Thanks a lot in advance!

Mathias