From your Mac, sign in to Office 365 operated by 21Vianet with your work or school account. I do have Office for MAC 2008 on my same MACBook Pro would this be an issue if I have two different offices on the same machine. I downloaded office 11 for MAC from the microsoft website. When input the key code, it tells me it isn't the right one. I can install 365 premium, but not office for some reason. My issue is with Outlook for Mac version 15.3. I have not used the 'outlook for mac 2011' app on this computer, bc I've heard such negative things about it.
I'm running OS X, Yosemite 10.10 on a MacBook Pro 15', Mid 2014 model. Known issues syncing Google accounts to the Microsoft Cloud. Categories no longer appear in the sidebar of individual calendars. Sending meeting updates with REST calendar sharing feature in Outlook for Mac.
Outlook for Mac 2011 does not work with macOS 10.15 Catalina.