It does not apply the sync settings to the new Groups feature as Groups are cached in in a separate data file (account-name.nst). Outlook 2016 applies the sync setting to shared or delegate folders and mailboxes, and public folders that are cached. When Exchange server users have shared or delegate folders, shared mailboxes, and public folders in a profile, Outlook 2013 caches the contents of these folders in the *.ost file, however, the sync setting does not apply to these folders, and all contents of these folders are stored in the local cache file. Shared or delegated (Outlook 2013 only).The sync settings do not apply to the following Outlook items. Users will need to use Instant Search or OWA to view older messages. In Outlook 2016, shared mailboxes do not (currently) have the link (or active View on Server button) to view more messages on the server. You can also click the View on Server button on the Folder tab to view messages not synced locally.

To view mail that is not synced down, click on ' Click here to view more on Microsoft Exchange' at the bottom of the message list. IMAP accounts can synchronize as little as 1 month. In Outlook 2013 or if you open the profile using the Mail Setup dialog (Control Panel > Mail), the dialog will look similar to this:įor Outlook 2013, Exchange accounts can synchronize as little as 1 month, while Exchange accounts (including ) in Outlook 2016 and up can synchronize as little as 3 days of messages. At some point, Outlook started resorting to Work Offline every time it started. This allows me to have Outlook open for access to the cached information and it doesn’t try to connect and update all the folders whenever I establish a VPN back to the office.

In new versions of Outlook, the dialog looks like this: When I am away from the office I often set Outlook to Work Offline. The default setting is based on the free space available on your hard drive. Slide the control to determine how much older email is stored offline. To check the sync settings, open File, Account Settings dialog and double click on the email account.

Outlook 365 work offline setting