Forwarding email sent to your Office 365 Outlook online to another email address is especially useful at times when someone else needs to read your email or you just want a second copy available somewhere else

The procedure for setting up email forwarding in Outlook online is very straightforward. 

If you wish to have all incoming email forwarded to another email address, follow the instructions below:

1. Sign in to your Office 365 account at https://login.microsoftonline.com
2. Open Outlook
3. Click on the cog icon at the top right of the page and in the drop-down Settings menu click Mail
4. Click on Forwarding --> Start Forwarding and enter in the email address you want email to be forwarded to
5. To retain the email in the mailbox after forwarding, tick “Keep a copy of forwarded messages”
6. Click Save

Send a few test emails to yourself to make sure your new forwarding rule is working. 

Now you should be able to read your email in more than one email mailbox.