The Archive Shuttle Office 365 module may log the following error:
2016-04-25 10:44:43Z|5812| 22|ERROR| Execute|Unable to process command Office365ProvisionMailbox: System.Management.Automation.PSInvalidOperationException: The WinRM client cannot process the request. Requests must include user name and password when Basic or Digest authentication mechanism is used. Add the user name and password or change the authentication mechanism and try the request again.
Office 365 commands could fail to be executed, as the PowerShell commands are missing username and password.
Add or re-enter credentials into ArchiveShuttle.Module.CredentialsEditor.exe