Get-MailUser Get-Contact (et al) is not recognized as the name of a cmdlet, function, script file, or operable program2018-10-01 11:07:32
Errors Office 365 System Requirements Troubleshooting
The following errors may occur on Discovery or Sync of an Office 365 tenant:
These errors usually result from insufficient access rights on the Office 365 user account being used (Source tab of the connection).
CommandNotFoundException: The term 'Get-MailUser' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
The exact error will differ depending on the action being taken:
Please review UnitySync Office 365 login requirements which explains the minimum rights necessary for Discovery of o365.