Hi MM-3430
Firstly, if you want to move from GoDaddy to Microsoft 365. This requires updating DNS settings with records provided by Microsoft 365. Next, head over to the Microsoft 365 admin center to add and verify each domain you plan to migrate. Set your desired domain (e.g., newco.com) as the default domain. For your GoDaddy DNS settings, remove any existing Microsoft 365-related records and add the new DNS records provided by Microsoft 365.
Once your domains are set up, migrate your mailboxes using Microsoft 365 migration tools. Ensure that you update MX records for each domain to point to Microsoft 365 after the migration is complete. then user identity update. Adjust user email addresses, setting the newco.com domain as the primary email address. Don't forget to add aliases for the old domains (e.g., Company1.com, Company2.com) to each user account in Microsoft 365.
And finallyp, update external services, applications, and devices to use the newco.com domain for email communication. I will ping the documentation links for more details find them below, for more info you can always reach out via 365 support via your 365 admin center, as this takes time I recommend raising a support req for faster switching. https://learn.microsoft.com/en-us/search/?terms=Add%20DNS%20records%20to%20connect%20your%20domain%20godaddy
If this helps kindly accept the answer thanks much.