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Which companies use Microsoft 365 Mail?

What CipherCue observes about Microsoft 365 Mail across tracked organisations: adoption, where it concentrates, and the organisations running it on their public infrastructure.

6,803 Observed organisations observed running Microsoft 365 Mail on their public infrastructure

A few of the organisations we observe running Microsoft 365 Mail. Sign up free to filter and view the full list by country and sector.

See all 6,803 organisations using Microsoft 365 Mail

Free, no credit card. Filter and view every organisation observed running Microsoft 365 Mail, alongside their full tech stack, hosting geography, and observed change history.

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How this is observed: CipherCue continuously probes the public-facing infrastructure of tracked organisations. Microsoft 365 Mail is detected via HTTP response headers, HTML fingerprints, and TCP service banners. Each observation is timestamped and stored alongside its evidence. See the observation methodology for full detail.
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