To this article #WeAreMec I want to start with the tag because, this year's In MEC great statistics and amazing real life scenarios shared.
- Exchange Online Tenant to Tenant Migration
In MEC 2022, you can migrate mailboxes located on an existing tenant to another tenant.
There will be a new migration batch type to facilitate inter-tenant migration, similar to how you would configure the on-premises exchange in a Hybrid migration you configure the migration endpoint and once the batch is complete the source mail will be able to become an active user.
For example: [email protected] Can be used on 1st tenant [email protected] account can be created and used on the 2nd tenant.
Cross-Tenant Identity Mapping (preview) – Microsoft 365 Enterprise | Microsoft Learn
Exchange Online Statistics
At MEC 2022, statistics were shared for Exchange Online, the largest service of Microsoft 365.
In Exchange Online, mailbox servers are hosted as physical servers and currently the Exchange Online environment is configured to support 7.3 billion mailboxes, it is reported that there are 300.000 physical mailbox servers in total.
Office 365 had 2022 million active users in April 345.
Each mailbox is located in a DAG. The DAG operates in three active and one lagged states.
During MEC, Greg Taylor shared more detailed statistics for Basic Authentication passes;
