Does Groupwise Migrator for Exchange migrate the additional send option attributes stamped on mail messages to Outlook, such as Delayed Delivery time, Expiration Date etc...?
No. Groupwise Migrator for Exchange does not migrate the send options attributes stamped on mail messages from Groupwise to Exchange. There is no equivalent functionality in Outlook, therefore the attributes are not migrated over with the mail message.
Enhancement request CR74385 has been submitted to Development for consideration in a future release of Groupwise Migrator for Exchange.