At setup, the user can decide to enable Cached Exchange Mode. New Exchange accounts set up on computers running RDS use Online Mode by default. When you configure a computer running RDS to use Cached Exchange Mode, be sure to consider the additional storage space and disk I/O that are required for multiple client accesses. Outlook 2016 supports running in Cached Exchange Mode in a Remote Desktop Services (RDS), formerly known as Terminal Services, environment that has multiple users. So, when you use Cached Exchange Mode, Outlook must be connected and open at the assigned delivery time for the delayed delivery message to be sent.
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Kiosk scenarios, where a particular computer has many users who access different Outlook accounts-and the delay to download email messages to a local cache is unacceptable.Online mode is useful in the following situations: Users who have high-latency connections (greater than 500 ms) to Exchange Server.
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Users who frequently work offline or without connectivity.Users who frequently move in and out of connectivity.Mailbox data is only cached in memory and never written to disk.Ĭached Exchange Mode is the preferred configuration in Outlook 2016 and is useful in the following situations: Online Mode works by using information directly from the server, and, as the name implies, it requires a connection. We recommend always using Cached Exchange Mode with an Office 365 account.