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22 Jan, 2026
Free Tool
Migration Timeline Estimator
Estimate how long your email migration to Microsoft 365 will take based on mailbox count, data volume, connection speed, and migration complexity.
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Your upload speed in Megabits per second
Typical Migration Timelines by Platform & Size
| Source Platform | 1–25 Mailboxes | 25–100 Mailboxes | 100–500 Mailboxes |
|---|---|---|---|
| On-Premise Exchange | 1–2 weeks | 2–4 weeks | 4–8 weeks |
| Hosted Exchange | 1 week | 1–3 weeks | 3–6 weeks |
| Google Workspace | 1–2 weeks | 2–5 weeks | 5–10 weeks |
| IMAP Provider | 1–3 weeks | 3–6 weeks | 6–12 weeks |
| POP3 Provider | 2–4 weeks | 4–8 weeks | 8–16 weeks |
Timelines include planning, testing, migration, and post-migration support phases. Actual timelines vary based on data volume, internet speed, and complexity. View full Cloud Email details
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