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Note: by default Cached Exchange Mode is enabled when adding an Exchange account.įor system recommendations for using Cached Exchange Mode, see the section Outlook Cached Mode Recommendations below. To enable Cached Exchange Mode, follow the steps below for your version of Outlook: Please double-check that the Cached mode is enabled and the offline data file was created to access the mailbox. Note: It is impossible to use the feature Work Offline if the Outlook is in Online mode. This may help improve the performance of Outlook on slow Internet connections. Outlook and the Exchange Server synchronize the local and server data periodically. Outlook accesses this cached copy for most operations speeding response times.
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While Online Mode maintains a direct connection to an Exchange server, Cached Exchange Mode creates a local copy of the mailbox data stored on the Exchange server in an offline data file (.ost file). There are two ways to connect Outlook to an Exchange account: Online Mode and Cached Exchange Mode.
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If you check Remove from server when deleted from Deleted Items, the messages will be deleted when you delete them in Outlook. In terms of performance, even using a large number such as 365 days is better than not checking this box. Therefore, we recommend choosing a number of days that’s long enough that you’ll be able to read the messages in your other mail program (or Webmail). If you leave messages on the server forever, it can eventually slow down your mail connections and use up your disk space allowance. Make other selection choices as appropriate. Mark check box Leave a copy of messages on the server in Delivery option.In Account Settings window, choose the account you want to set, then choose Change… and click More Settings….
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