How do I switch to a different account or mailbox in Office 365 / O365?

If you have permissions to a different mailbox, you can switch to that mailbox view in Office 365 Outlook.  Here are the steps:

1.  Log in to your email box at outlook.office.com

2.  Click on your initials in the upper right-hand corner.  Hint:  they might be backwards.

Outlook account menu showing the “Open another mailbox” option. A red arrow points to the users icon in the upper right, and a second arrow points to "Open another mailbox"

3.  Click Open Another Mailbox.

4.  Type in the email address for the account you want to switch to and click Open.

“Outlook ‘Open another mailbox’ dialog with ‘TCC’ typed in the search box and TCC IT Help Desk selected from the results.”

That's it!  You should now be attached to your secondary mailbox.

Sending an email from the other Inbox you can change the FROM to reflect the Inbox your in.

1. Click on New mail and then click on Options at the top.

The image of the ribbon bar in O365, the first red arrow points to Options, a second red arrow points to New mail.

2.  Check the box for Show From, then when you click From, you will see a list of Mailboxes you have permission to send mail from.

An image of the ribbon bar with the first red arrow points to "Show From" selected, the second red arrow points to the From button. The third red arrow points to a list of emails you have the option's to send on behalf of.

 

That is it, now the email will show that it is from that other Mailbox and not from you.

 

 

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