Before attempting to install/download/run Office 2016 for Mac make sure you complete all of the following instructions
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Problem:
After installing Microsoft Office and launching any Microsoft Office application,
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during the authentication process, you receive a notification that says, "There is a problem with your account. Please try again later." See image below:
This happens because the default keychain will not trust
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Fairfield University's sign-in (authentication) page.
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Solution:
This is a known issue between Apple and many university authentication systems.
Using *SAFARI* only you must allow the certificate prior to using Office 2016 for Mac with Office 365 with Fairfield University.
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