We are looking to move away from groupwise and want to do it slowly. We have mulitple Post Offices that represent departments and want to migrate a department at a time.

We need the rest of the organization to be able to email these migrated departments but also need the migrated departments to see there old groupwise mailbox as a type of archive.

Is there a way to break the connection so that groupwise knows to send email outside while still allowing users to see the old mailbox?

Please let me know if this doesn't make sense and I will try to be clearer. Thank you all for your time.