GroupWise gets its time zone setting from the operating system where GroupWise is running. In all likelihood, your system will be configured by default to automatically set the time zone based on your location. If you want to manually update your GroupWise time zone, you will need to disable the automated setting in Windows and then change the time zone of your operating system.
Right-click the date and time group tile in the Windows notification area on your device.
Select Adjust date and time.
If Set time zone automatically is enabled, disable it. Otherwise, go to the next step.
Select your desired time zone from the drop-down menu in the Time zone option.
Close the Settings window.