The Cronofy calendar integration in onlyfy Application Manager supports Microsoft Exchange, Outlook, Office 365, G-Suite (Google Apps for Business) and Apple iCloud calendar clients.
If you use GroupWise as an email client for one of these providers, the integration in Application Manager also works. However, connecting GroupWise as a provider itself is not possible. In case of doubt, please contact Cronofy directly (support@cronofy.com) for further details.