Setting, changing, or canceling an Out of Office message.Working with Shared Folders that were not made available offline.
These operations won't function when Outlook is not connected and can take longer to complete on high-latency connections.
Large mailboxes on computers that don't have sufficient hard disk space for a local copy of the mailbox.Įven when it is configured in Cached Exchange Mode, Outlook 2016 must contact the server directly to do certain operations.In addition, we recommend that you consider using Encrypting File System (EFS) or BitLocker as a robust solution. Heavily regulated compliance or secure environments where it is a risk to store data locally.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.