How to add or access a Mailbox you have permission to

How to access a mailbox in OWA (Outlook Web App) / Office 365

Login to office.com with your campusnet username (e.g. mmusterfra@jacobs-university.de) and password and click on your avatar in the upper right corner. Now choose 'Open another mailbox'.

The 'Open another mailbox' dialog opens and you can enter the name of the mailbox you have permission to. Click on 'Open' to open the mailbox.

The mailbox opens in another tab or window in your browser.

Add a mailbox you have permission to, to your Outlook

Right click on your mailbox in Outlook and choose 'Data File Properties...' in the upcoming menu.

In the newly opened window choose 'Advanced...'.

Another window opens and you have to choose the 'Advanced' tab and then click on 'Add...'.

In the 'Add Mailbox' dialog enter the name of the mailbox you like to add, then click 'OK' to close this and all other dialog windows

The mailbox now shows up in your Outlook, under your own mailbox.