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Sent items disappear after a month

J-3804 1,601 Reputation points
2023-09-12T22:12:26.2333333+00:00

Hi team,

A user's Outlook sent items disappear after a month, there are no rules set up on the user mailbox, and there is no retention policy setup. Same in OWA . Could you please let me know what I need to check?

Thank you for your help

Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Kael Yao-MSFT 37,711 Reputation points Microsoft External Staff
    2023-09-13T06:16:16.32+00:00

    Hi @Jennifer,

    If this issue only happens when messages reach 30 days old, please use Content Search to see if you can find the missing messages in other folders of the mailbox.

    If this mailbox doesn't have any retention policy assigned and no archive mailbox enabled, please also have a check if it has AutoArchive setup in Outlook.

    For example:

    01

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