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Microsoft 365: Suppress Read Receipts

By default Microsoft 365 will send read receipts when requested. This can be suppressed as follows:

  1. Log in at and go to the Mail app.

  2. Click the Cog in the top right corner and choose Options.

  3. Under General, Mobile Devices, tick Don't send read receipts for messages read on devices that use Exchange ActiveSync.

    (This affects devices such as iPhones.)

  4. Under Mail, Automatic Processing, Read Receipts, select Never send a response.

    (This affects the Outlook Web Access interface.)

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