How to Exmerge a Mailbox Larger Than 2Gb

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How to Exmerge a Mailbox Larger Than 2Gb
Exmerge is used to export Exchange mailbox e-mails (e-mail simbol image by vladislav susoy from

Exmerge is a tool used to extract mailbox information from a Microsoft Exchange server. If the user's mailbox is greater than two gigabytes of information, each component needs to be exported separately. This means the inbox e-mails need to be exported in groups no greater than two gigabytes in size. The Exmerge tool allows you to export mailbox information based on search criteria such as date or subject. This can be used to export messages from a mailbox that is over two gigabytes in size.

Skill level:
Moderately Challenging


  1. 1

    Double-click the "Exmerge.exe" file on your Exchange server's hard drive. This executable is located in the directory where your Exchange server is installed. This is normally "C:\Program Files\Exchange Server."

  2. 2

    Select "Extract or Import (Two Step Procedure) " and click the "Next" button. On the next window, select "Step 1" and then click the "Next" button.

  3. 3

    Enter your Exchange server name in the text box labelled "Microsoft Exchange Server Name" and click the "Options" button. This opens a new window where you can extract e-mail parts from the Exchange server.

  4. 4

    Click the "Data" tab. In the section labelled "Data Selection Criteria," enter a date range to save the first part of the user's e-mail. For instance, if the user's mailbox is over two gigabytes and the total range for the email files is a year, use a range of six months to export the email in partitions. Click the "Ok" button and then click the "Next" button in the main Exmerge window.

  5. 5

    Select the language in the drop-down box labelled "Default locale" and press the "Next" button. Select a locate on the hard drive for the saved Exmerge file and press "Next."

  6. 6

    Click the "Save" button at the summary screen. Exmerge extracts the user's e-mail into a file on the hard drive. Repeat these steps to extract the rest of the user's e-mail.

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