Speed issues, or performance in Outlook - clear the Outlook Cache
Should you ever need to clear the Outlook Cache follow our guide below:
Right click on the windows icon & choose Run (or press the windows key + R)
Type in the following in the Run box: %LOCALAPPDATA%\Microsoft\Outlook\
Click OK
This will now clear the Outlook Cache on your laptop.
Restart Outlook and the speed issue will now not be a problem.
Restart Outlook and the speed issue will now not be a problem.