Your company has an on-premises Microsoft Exchange Server 2016 organization and a Microsoft 365
Enterprise subscription.
You plan to migrate mailboxes and groups to Exchange Online.
You start a new migration batch.
Users report slow performance when they use the on-premises Exchange Server organization.
You discover that the migration is causing the slow performance.
You need to reduce the impact of the mailbox migration on the end-users.
What should you do?
A . Create a mail flow rule.
B . Configure back pressure.
C . Modify the migration endpoint settings.
D . Create a throttling policy.
Answer: C
Explanation:
The migration is causing the slow performance. This suggests that the on-premise Exchange server is struggling under the load of copying the mailboxes to Exchange Online. You can reduce the load on the on-premise server by reducing the maximum number of concurrent mailbox migrations. Migrating just a few mailboxes at a time will have less of a performance impact than migrating many mailboxes concurrently.
Reference: https://support.microsoft.com/en-gb/help/2797784/how-to-manage-the-maximum-concurrent-migration-batches-in-exchange-onl