New-mailboxsearch how works?

GhostWins 21 Reputation points
2022-02-02T10:04:58.963+00:00

Hello everyone. I want to know how many size of messages in mailbox and using New-mailboxsearch. If i use CAS i see my mailbox size equal 126MB, but if i use New-mailboxsearch and return all values, i see 450MB in console log and powershell log. How? The mailbox also uses archive, but archive size equal 2MB. I tried export found result to PST, and PST size was equal 126MB how mailbox. Why CAS sees 450MB if i use New-mailboxsearch and sees 126MB in information about user's mailbox?

P.S. I used this code for create task

New-MailboxSearch -name test10 -SourceMailboxes test -StartDate 01/01/2017 -EndDate 01/31/2022 -EstimateOnly

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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Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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Windows Server PowerShell
Windows Server PowerShell
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.PowerShell: A family of Microsoft task automation and configuration management frameworks consisting of a command-line shell and associated scripting language.
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  1. Limitless Technology 39,351 Reputation points
    2022-02-03T08:55:47.577+00:00

    Hello

    Thank you for your question and reaching out.

    In Exchange Server and Exchange Online, the maximum size of discovery mailboxes, which are used to store In-Place eDiscovery search results, is 50 GB. Prior to the current size limit, you were able to increase the storage quota to more than 50 GB, which resulted in having discovery mailboxes much larger than 50 GB.

    Note: As of October 2020, the *-MailboxSearch cmdlets are retired in Exchange Online PowerShell. Use the *-ComplianceSearch cmdlets in Security & Compliance Center PowerShell instead.

    https://learn.microsoft.com/en-us/microsoft-365/compliance/legacy-ediscovery-retirement?view=o365-worldwide

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