I have a valid visa. Can the Department cancel my visa because of the ban while I am overseas?
If the Department decide to cancel your visa, they will notify you in writing and you will be given an opportunity to seek revocation of the visa cancellation decision. They will send this by email to the email address that they have on file for you.
You can always check the status of your visa with the myVEVO app on the Apple Store or Google Play or online here.
If VEVO is not working (due to high volumes of use at this unusual time), you may create an ImmiAccount and import your visa application with the details listed in your visa grant notice.