Turn on or off Cached Exchange Mode

Cached Exchange Mode saves a copy of your mailbox on your computer which provides quick access to your data and is frequently updated with the server that runs Microsoft Exchange.

 Note    A Microsoft Exchange Server account is required.

ShowMore information about Cached Exchange Mode

Cached Exchange Mode enables a better experience when you use an Exchange account. In this mode, a copy of your mailbox is saved on your computer. This copy provides quick access to your data, and it is frequently updated with the server that runs Microsoft Exchange.

If you are unable to turn on Cached Exchange Mode, one or more of the following might apply:

  • An Exchange account doesn't exist in your Microsoft Outlook profile     This feature requires that your Outlook profile contain an Exchange account.
  • Your Exchange server administrator has disabled this functionality     Exchange administrators can disable this feature in Outlook. For more information, contact your Exchange administrator.
  • Microsoft Terminal Services is installed     Cached Exchange Mode is not available on computers that run Windows Server when Microsoft Terminal Services is installed.

Turn on or off Cached Exchange Mode

  1. Click the File tab.
  2. Click Account Settings, and then click Account Settings.
    Account Settings in the Backstage view
  3. On the E-mail tab, click the Exchange account, and then click Change.
  4. Under Microsoft Exchange server, select or clear the Use Cached Exchange Mode check box.
    Use Cached Exchange Mode check box
  5. Exit and then restart Microsoft Outlook 2010.

When you are using Cached Exchange Mode, an e-mail message may remain in the Outbox for up to one minute until the next synchronization with the server that runs Exchange occurs. If you want to send the message immediately, do the following:

  • On the Send/Receive tab, in the Send & Receive group, click Send All.
    Send & Receive group in the ribbon

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Manually configure message download preferences

Cached Exchange Mode can automatically optimize data transmissions for the connection speed to the server that runs Exchange. However, you can manually change the download preferences.

  1. On the Send/Receive tab, in the Preferences group, click Download Preferences.
    Download Preferences command in the ribbon
  2. Click one of the following options:
    • Download Full Items     This is the default setting. All messages and attachments are downloaded.
    • Download Headers and Then Full Items     After message headers are downloaded, downloading of message bodies and attachments begins. When downloading a large amount of items, this setting is useful so you can see message headers quickly and then choose a message to open without first waiting for all messages to be downloaded in their entirety.
    • Download Headers     No message bodies or attachments are downloaded. This reduces the data transfer amount and connection time. When you open an item, the full item is then downloaded from the mail server.
    • On Slow Connections Download Headers Only     When a slow connection is detected, message bodies and attachments are not downloaded. If this option is not selected, the three previous choices determine what is downloaded regardless of the connection speed.

In addition to Exchange folders, Cached Exchange Mode works with shared folders. Examples of shared folders include another person's Exchange folders when you are using Delegate Access, or SharePoint folders. To turn on or off shared folder support when you are using Cached Exchange Mode, do the following:

  1. Click the File tab.
  2. Click Account Settings, and then click Account Settings.
    Account Settings in the Backstage view
  3. On the E-mail tab, click the Exchange account, and then click Change.
  4. Click More Settings.
  5. On the Advanced tab, under Cached Exchange Mode Settings, select the check boxes for the options you want.

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Applies to:
Outlook 2010