Option to add shared mailbox is missing in my colleagues outlook...

Hi all,

My small company is expanding from 1 to 2 employees. This brings new challenges to my IT skills :).

One thing I can't figure out is the next problem: After I set up 2 individual microsoft 365 accounts I added a shared mailbox (mailto:info@....). Gave both of us access and try to add the shared mailbox to my outlook. I can add the mailbox in Outlook (for Mac) by going to setting -> account -> add shared mailbox. My colleague is missing this option enterily. So, not specific for this mailbox, but in whole.

Where I see 2 options:

- add mailbox

- add shared mailbox

She only sees 1 option:

- add mailbox