Microsoft released the Outlook for Windows app as their replacement for the Mail and People apps in Windows 10 and Windows 11. Upon using the new email app, users complained that they no longer access their emails offline, unlike with the classic version.
Fortunately, Microsoft is trying to integrate offline functionalities on the Outlook for Windows app but with a small glitch. You must open the app online and must remain running until you no longer have Internet connection. Otherwise, it will only show an error if you launch it without network connection.
It may not be as seamless as we expect it to be, but for now, we have the option to access our email offline. You also have the option to manually enable or disable the offline feature
Steps to Manually Enable Offline Email Support in Outlook for Windows App

Enabling or disabling the offline support on your Microsoft Outlook app offers the same steps. Let’s check it out below.
On your Outlook Windows PC app, navigate to the Settings menu or the cog wheel icon. Head over to General and select Offline.
Look for the option Enable offline email, calendar, and people and toggle the button to On to enable it or Off to disable it.
Wrapping Up!
Offline access to files and emails is crucial to many people, especially if they need to travel for work. With the offline feature on Outlook for Windows app, users can be more productive even without any Internet connection.