Changing your primary domain for G Suite | Name.com
https://www.name.com/support/articles/229659727-Changing-your-primary-domain-for-G-Suite
Change your primary domain for G Suite – G Suite Admin Help
https://support.google.com/a/answer/7009324?hl=en
Alternatives to changing your primary domain – G Suite Admin Help
https://support.google.com/a/answer/54819?hl=en
Rename a user or change a user’s email address – G Suite Admin Help
https://support.google.com/a/answer/182084?hl=en
How to Transfer G Suite to another Domain : gsuite
https://www.reddit.com/r/gsuite/comments/c90q8m/how_to_transfer_g_suite_to_another_domain/
How to Migrate Google Apps (G Suite) to Office 365 Manually – Blog
https://www.mozesoft.com/blog/how-to-migrate-google-apps-g-suite-to-office-365-manually/
Changing your primary domain for G Suite | Name.com
https://www.name.com/support/articles/229659727-Changing-your-primary-domain-for-G-Suite