Active Roles 7.4.4 is unable to retrieve Exchange Online Mailbox properties.
Also verbose logging shows the following error:
"Error: 'Exception calling "GetSteppablePipeline" with "1" argument(s): "Exception calling "PromptForCredential" with "4" argument(s): "A command that prompts the user failed because the host program or the command type does not support user interaction. The host was attempting to request confirmation with the following message: Enter your credentials for https://outlook.office365.com/PowerShell-LiveID?BasicAuthToOAuthConversion=true.""'"
Restart Active Roles Administration Service, it will reset and reconnect to the Exchange Online session.
The following bug ID 281545 has been created to address this issue and it will be fixed in a feature release version.