M365 - Exchange Online Center

ENow Software's Microsoft Exchange Online blog built by Microsoft MVPs for IT/Sys Admins.

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Thomas Stensitzki

Secrets of Exchange Online Mailbox Provisioning

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Thomas Stensitzki

Exchange Online has different ways to provision mailboxes. Exchange Online is a standard service within Microsoft 365, which in the simplest case provides a mailbox. However, an Exchange Online mailbox also serves as a storage location for user-related data from other Microsoft 365 services. The most prominent example of this is Microsoft Teams. What exactly happens when Exchange Online provisions a mailbox depends on different factors. Especially when using hybrid identities synchronized with Azure AD Connect, there are essential points to consider.

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Changes to Exchange Online

Changes to Exchange Online Web Services

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Thomas Stensitzki

Exchange Web Services (EWS) have been an integral part of Exchange since Exchange Server 2007. They are used not only by Exchange Server and Exchange Online for communication between Exchange Servers and as part of hybrid communication. Email clients also use web services. EWS is a SOAP-based API, but in the meantime, there are more modern protocols. Back in 2018, the Exchange product group announced that there would be no further development for the EWS protocol in Exchange Online. Indirectly, the EWS Managed API README-file on GitHub contains an announcement for Exchange Server.

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Why Modern Exchange Hybrid?

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Thomas Stensitzki

Why Modern Exchange Hybrid?

The question of why should I implement Exchange Modern Hybrid is justified. Exchange Modern Hybrid is specially designed to simplify implementing Exchange Hybrid Mode by eliminating the requirement for inbound HTTPS connections to an on-premises Exchange organization. The technical specifications for Classic Exchange Hybrid are sometimes unsuitable for enterprises. You can read more about the differences between the two Exchange Hybrid modes in ENow's blog post, "What are your Hybrid Options."

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