Turn On Cached Exchange Mode. Then exit and restart Outlook to take advantage of the Cached Exchange Mode. Tap on File in the upper right expand Account Settings and click Account Settings from the drop-down.
If following is the list of errors then you can easily resolve them. Click the Exchange or Office 365 account and then hit Change option. Click the Exchange or Microsoft 365 and then click Change.
Once done click apply and restart Outlook.
Issue - If you do not have an Exchange e-mail account configured on Outlook. Turn on Cached Exchange Mode in Outlook 20132016. Under Offline Settings check Use Cached Exchange Mode. To enable cache mode one has to follow the steps given below.
