Cloudiway migrates Google Vault mail archives and Office 365 In-Place archives to any target. This article explains the pricing system.
Google Vault and Office 365 mail archive migrations are treated the same way as the standard mail. To migrate your archives, you should buy an individual Archive migration license per user and set up a separate list of mail archives for migration.
Alternatively, you can purchase Mail and Archive migration license to reduce the costs of migration.