Addressing throttling during large migrations

Overview

Cross-tenant and large mailbox moves hit Microsoft throttles. Planning beats firefighting.

Strategies

• Use vendor migration tools respecting limits; parallel threads per guidance.
• Schedule off-hours batches; pad timelines in SOW.

Client expectations

“Weekend cutover” may still need incremental sync days before.

Health

Monitor service health advisories; open premier/vendor tickets early if enterprise scale.