In addition, a hybrid deployment can serve as an intermediate step to moving completely to an Office 365 organization.
Here are some third-party migration tools and partners that can assist with Exchange migrations from third-party platforms: Binary Tree: Provider of cross-platform messaging migration and coexistence software, with products that provide for the analysis of and the coexistence and migration between on-premises and online enterprise messaging and collaboration environments based on IBM Lotus Notes and Domino and Exchange and Share Point.
The other main migration method involves hybrid moves, which is currently the most common method.
You can decide exactly when you'd like to migrate to Microsoft 365, based on your business needs.
Quadrotech: Provider of migration solutions to Office 365.
There are a number of methods for migrating mailboxes and mailbox data, starting with Cutover migrations and Staged migrations, which are based on merge and sync moves, and which are described earlier in this article.
You can migrate a maximum of 2,000 mailboxes from your on-premises Exchange organization to Office 365 using a cutover migration.
The recommended number of mailboxes, however, is 150. The mail contacts and distribution groups in your on-premises Exchange organization are also migrated.
A hybrid deployment offers organizations the ability to extend the feature-rich experience and administrative control they have with their existing on-premises Exchange organization to the cloud.
A hybrid deployment provides the seamless look and feel of a single Exchange organization between an on-premises Exchange organization and Exchange Online in Microsoft Office 365.