Understanding Throughput, Bandwidth and Capabilities when doing Mailbox Migrations into Office 365

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Great topic for anyone looking to do Mailbox Migrations into Office 365:

Migration Tool Migration method User throttling Migration-service throttling Office 365 resource health-based throttling Observed average throughput per hour and per client (if applicable)
Native O365/Simple Migration IMAP4 migration No Yes Yes 5-10 gigabyte (GB) (50 concurrency)
Native O365/Simple Migration Cutover Exchange migration No Yes Yes 5-10 GB (50 concurrency)
Native O365/Simple Migration Staged Exchange migration No Yes Yes 5-10 GB (50 concurrency)
Native O365 Hybrid migration No Yes Yes 10-15 GB (per On-premise Exchange 2010 CAS)
Third Party MAPI Yes No Yes 0.5-1 GB
Third Party EWS No Yes Yes 5-10 GB
Client Uploading Outlook Yes No Yes 0.5 GB

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