1 step-by-step Exchange Server jobs with official downloads, exact clicks and checks.
At the end you will have downloaded the Hybrid Configuration Wizard (HCW), run it against your Exchange Server organisation and Exchange Online, and checked that hybrid is in place.
Pick the right method for your Exchange version and mailbox count, set up hybrid or a cutover batch, move mailboxes and public folders, then switch MX and Autodiscover to Exchange Online.