Managing Outlook folder sharingīy default, when Cached Exchange Mode is enabled, shared mail and nonmail folders that users access in other mailboxes are downloaded and cached in the user's local.
ost file size, and the expected level of performance.įor troubleshooting tips about diagnosing and addressing performance issues in Outlook, see How to troubleshoot performance issues in Outlook. However, several factors can influence a user's perception of Cached Exchange Mode performance, like hard disk size and speed, CPU speed. Most users find that Cached Exchange Mode performs faster than online mode. The Exchange Fast Access feature that was added to Outlook 2013 Exchange Cached Mode has been deprecated in Outlook 2016.
ost), use the Group Policy template for Outlook (Outlk16.admx) to enable the Do not create new OST file on upgrade policy setting.įor more information about how to configure this and other settings, see Using Group Policy and the Office Customization Tool (OCT).
If you must keep Outlook 2016 from creating a new compressed Outlook data file (. ost file is kept and, if it is necessary, can be opened by Outlook 2016. However, by default, when Outlook 2016 is installed and Cached Exchange Mode is enabled, a new compressed version of the Outlook data file (. When upgrading, if you do not change Cached Exchange Mode settings, the same settings are kept for Outlook 2016. Upgrading existing Cached Exchange Mode users to Outlook 2016 ost file size, see How to configure the size limit for both (.pst) and (.ost) files in Outlook.
In some cases, you can improve the performance of Cached Exchange Mode for your whole organization or for a group of users-for example, users who work remotely. Planning considerations for Cached Exchange Mode for Outlook 2016 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.
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.
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.