Outlook downloads all your tasks ... hit the ‘Change’ button. 4] Instantly, a ‘Change Account’ will appear, showing you a ‘Use Cached Exchange Mode’ enabled under ‘Offline settings ...

As you can see in the above screenshot, if you’ve been forced to use new Outlook, you need to manually click “Go to classic ...

The issue can be confirmed by looking in the Sync Issues Synchronization Log of the primary Exchange account in your Outlook profile. Beyond the primary issue, additional symptoms, such as ...

Microsoft does say that once the change is ultimately made ... to use the new Outlook for Windows with any personal email account (Outlook.com, Gmail, etc) even without a subscription.