My organization has a domain registered with GoDaddy and for which we use Cloudflare NS (pactpartners.com)
I am willing to change email provider on this domain from GlobalSP to Office365.
For the migration to be smooth, I would need to put a split domain routing in place but I am not sure where to start.
I understand I have to set a subdomain (mig.pactpartners.com for instance) with an MX pointing to O365 and a rule to forward all emails sent on @pactpartners.com to @mig.pactpartners.com The thing is I don’t know on what side to set those. Any advise is helpful. Many thanks.