Oh web outlook ugh. People where I work hate Outlook web. It's not intuitive. Shared mailboxes in web Outlook are a pain they dont show on the left sidebar they need to be opened in a separate tab. Terrible for efficiency. Except "out of office" which for shared mailboxes it can't be disabled in non-web Outlook you have to do it in web.

My day and job are based on Microsoft weirdness.