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Avatar of Randall Seiler
Randall SeilerFlag for United States of America

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Office 365 Hosted Exchange Security

I have a client that currently has SBS2011 with Exchange 2010 in-house.   I am recommending upgrading to Server 2019 Essentials and moving their e-mail to Office 365.

This client is very concerned (paranoid) that the data in their e-mail could be compromised or hacked, even by Microsoft personnel, since they communicate sensitive information with their clients and their lawyers.

I had talked to them previously about files stored in the “cloud” and how they sometimes are secured with a private encryption key so that even the personnel at the “host” couldn’t access the data; Azure Backup Encryption Passphrase for example.

How secure is the Exchange data that is stored on Microsoft’s servers (Office 365), and how is it secured?

Thank you in advance for any assistance and advice.
Avatar of Vasil Michev (MVP)
Vasil Michev (MVP)
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It's secure enough for pretty much all of the Fortune 100 companies to use it, it's secure enough for the US GOV. And there's plenty of information available online on how exactly data is stored and accessed: https://docs.microsoft.com/en-us/microsoft-365/compliance/encryption#encryption-for-data-at-rest-and-data-in-transit
Avatar of Randall Seiler

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Vasel - Thank you for the information
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