Hi Bautzie14,
When you say "I didn't actually install MS 365 because my mac can't support it", do you mean that you have downloaded the Office 365 Home Premium?
Office 365 Home Premium is not the same with Office 365 for Business. If you have installed the Office 365 Home Premium, I'd like to suggest you post a new thread in the Office 365 Home Premium/University forum.
More information:
Office 365 Home Premium
Select an Office 365 plan for business
Thanks,
Bourne Zhang