outlook inbox not updating can have various reasons. A "Cached Exchange Mode" is available in Outlook. It is a built-in feature that enables you to use Outlook both online and off. This Exchange problem shows if there is a discrepancy between the items of MS Outlook and the internet webmail. Alternatively, the ost file in Outlook keeps track of caches, messages, and other data. Outlook emails become a problem as a result. In contrast, the problem might be brought on by a slow refresh rate.