FAQs

Q: Is Microsoft Entra Connect required?

Yes. For most hybrid scenarios, Microsoft Entra Connect Sync is required to synchronize user accounts and identities between local Active Directory and Microsoft 365.

Q: What is the difference between Classic Hybrid and the Modern Hybrid Agent?

Classic Hybrid offers the most comprehensive coexistence between Exchange on-premises and Exchange Online. The Modern Hybrid Agent reduces the requirements for externally publishing Exchange services and simplifies certain migration scenarios.

Q: Does my Exchange Server need to be accessible from the Internet?

Depending on the hybrid model, this may be required. In particular, classic full hybrid deployments use published Exchange services such as Autodiscover and Exchange Web Services. Alternatively, the Modern Hybrid Agent can be deployed in certain scenarios.

Q: Can I migrate mailboxes to Exchange Online step by step?

Yes. One of the biggest advantages of Exchange Hybrid is that individual users or departments can be migrated gradually. This helps minimize downtime and ensures projects are carried out in a controlled manner.

Q: What is the Hybrid Configuration Wizard (HCW)?

The Hybrid Configuration Wizard is the tool provided by Microsoft for setting up an Exchange hybrid environment. The wizard automatically configures the necessary connections between the on-premises Exchange organization and Exchange Online.

Q: Which Exchange versions are supported for Exchange Hybrid?

Current hybrid deployments are primarily implemented with Exchange Server 2019 and Exchange Server Subscription Edition (SE). Companies should ensure that they always install the latest security updates.

Is Microsoft Entra Connect required?

What is the difference between Classic Hybrid and the Modern Hybrid Agent?

Does my Exchange Server need to be accessible from the Internet?

Can I migrate mailboxes to Exchange Online step by step?

What is the Hybrid Configuration Wizard (HCW)?

Which Exchange versions are supported for Exchange Hybrid?

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