Microsoft 365 Outlook Cached Mode is a recommended way to maintain seamless productivity for the users even when their internet connection is not stable or is unavailable. Using this mode, you can access your mailbox even without the internet connection since you can easily save of your mailbox items on your local system. This caching of mailbox data helps users to access their mailbox items even when their system is offline or has poor internet connection. The cached mode is also supported by automatic updates linked to emails, calendars, tasks etc. between the device and the server. Therefore, the user can continue to view, edit and work using the Microsoft 365 application without hampering their productivity and workflow.

Significance of Cached Mode in Outlook

Access During Downtime: Using this mode, you can always remain productive during server outages or interrupted connectivity.

Enhance the System Performance: Cached Mode can speed up data loading times for emails and attachments as the data remains stored locally. This can prove helpful in a scenario in which you have a large mailbox.

Safety of Data: Caching data locally ensures that your sensitive mailbox data remains accessible to you even when you don’t have a secure or reliable connection. 

Steps to Enable Cached Mode in Microsoft 365 Outlook

Follow the step-by-step instructions mentioned below to enable this mode in the Microsoft 365 Outlook application:

Step 1: Launch Microsoft Outlook on your computer and click on the File tab in the top-left corner.

Launch Microsoft Outlook on your computer and click on the File tab in the top-left corner.
 

Step 2: Click on Account Settings and select Account Settings from the drop-down.

Click on Account Settings and select Account Settings from the drop-down.
 

Step 3: In the Account Settings window, click on your email account. Then, click Change.

In the Account Settings window, click on your email account. Then, click Change.
 

Step 4: In the Microsoft Exchange settings window, check the box for Use Cached Exchange Mode. You can adjust the slider to control how much mail to keep offline (e.g., 1 month, 3 months, etc.).

In the Microsoft Exchange settings window, check the box for Use Cached Exchange Mode. You can adjust the slider to control how much mail to keep offline (e.g., 1 month, 3 months, etc.).
 

Step 5: To save the settings, click Next and then OK to apply the changes.

To save the settings, click Next and then OK to apply the changes.
 

Step 6: You may need to restart Outlook for the changes to take effect.

You may need to restart Outlook for the changes to take effect.