With Outlook 2013 we saw the introduction of the Sync Slider, which helps limit the size of OST’s by controlling how much recent mail was synchronized locally on the device. For Exchange accounts, this was 12 months by default, with the option to go down to 1 month or up to all mail. In Outlook 2016, Microsoft added more sync options that allow for better storage management by only retaining this much mail on the device: • 3 days; • 1 or 2 weeks; • 1, 3, 6, 12 or 24 months; • All.

If you are looking for a simple way to automatically backup Outlook 2016 emails rather than syncing to Cloud or other devices, you can create a scheduled backup plan for Outlook 2016 as an alternative way to sync emails and contacts and some other items in Outlook desktop program.

As before, this setting can also be adjusted using Group Policy. Whatsapp for mac 2018.