How to Set or Stop an Email Forward in Office 365
Forwarding Your Official Email
The University of Arizona does not recommend using outside email providers for university-related correspondence, nor does it recommend forwarding email from your official faculty/staff accounts to outside providers. If faculty/staff members choose to forward email from their university-assigned account to an outside provider, they do so at their own risk. The university is not responsible for problems with the handling and security of email forwarded to outside providers. UITS will not set a forward for a departmental email account to an outside provider.
How To Set or Stop Email Forwards
At the top of the page, choose Settings (gear icon) > Mail.

On the left menu, choose Forwarding.
Start forwarding by adding the address to forward to.
UA accounts, by default, do not keep a copy of your email in Office 365; it is only available in your destination account. Click the checkbox Keep a copy of forwarded messages if you wish to keep copies of your email in Office 365.
If you already have a forward set and wish to stop it, click the Stop forwarding radio button.

Click Save.