Using the web interface to Office 365, from the setting "gear" icon in the upper right, select "Options"
Under "Mail" / "Automatic processing" / "Inbox rules," click the "+" to add a rule.
Give the rule a descriptive name in case you need to edit it again.
Select the condition under which the rule applies, such as "[Apply to all messages]" - to forward only certain emails, specify the condition(s).
Under "Do the following," select "Redirect the message to..." and set the destination address. NOTE: "Forward" wipes out the sender's email address, making it impossible to reply to them!! Use "Rediect" instead!!