Hi, @mark007!
There are various ways to do that. If you're an end-user, the best solution for you is to use the Outlook web interface. To configure forwarding, follow these steps:
In a web browser, open https://outlook.office.com
Tap on the Settings (gear) icon to open Office 365 email settings.
At the bottom of the Settings menu, select View all Outlook settings.
Click on Mail > Forwarding.
Check the Enable forwarding checkbox.
Enter your destination email address to forward your emails to.
Note: It is recommended to check the Keep a copy of forwarded messages checkbox. This way, your emails will be saved in your current mailbox. So, if something goes wrong and the destination email address doesn't receive your messages, you won't lose your emails.
Click Save.
If you want to use other options (using email client, Office 365 admin center, etc.) for moving your Microsoft Office 365 emails, check this blog post https://www.nakivo.com/blog/how-to-move-office-365-emails-to-other-email-accounts/