How to change update frequency in OWA 2013 calendar, or force a refresh

Hi Robert,

Based on my research, OWA is always synced to the mailbox. It means, if your network is good enough, the data in OWA is always up-to-date.

However, in Outlook desktop version, there is a sync interval for Exchange account. Outlook uses 3 timers to optimize Cached Exchange Mode, namely a download timer, an upload timer and a maximum timer to fall back on. For detailed information, you can refer to the following article:

http://www.msoutlook.info/question/300

Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

Regards,

Steve Fan
TechNet Community Support