You can use Cached mode to determine the number of emails cached locally on your machine. Accessing locally cached emails is faster than accessing emails using online mode. It is recommended that Cached mode be enabled.


To enable Cached mode and choose what period of time emails should be downloaded from, please follow the steps below:


1. Click 'File'.
2. Click 'Account Settings, then 'Account Settings' again.
3. Select the account and then click 'Change'.

4. Ensure 'Use Cached Exchange Mode' is selected. 

5. Choose a period of time you would like emails downloaded from.

6. Click 'Next' then 'Done'.



When users have a very large number of emails, having Cached mode enabled sometimes can cause Outlook to load slowly. Reducing the period of time that emails are downloaded from should resolve this, i.e. changing the period from the default of 1 year to 6 months or less. If after reducing this, Outlook is still running slowly, disabling cached mode entirely may resolve the issue.


To disable Cached mode, please follow the steps below:


1. Click 'File'.
2. Click 'Account Settings, then 'Account Settings' again.
3. Select the account and then click 'Change'.
4. Untick 'Use Cached Exchange Mode'.

5. Click 'Next' then 'Done'.



Please feel free to get in touch with our team on 0117 933 0573 or [email protected] if you need any further assistance with this.