In this case, the client cannot allow the elevation and you cannot see an approval request. The client will intelligently determine it is indeed offline (i.e. has no Internet access) and, on the approval screen, a note will automatically appear telling the user that elevation can happen only if the user either seeks an internet connection or, if not possible, contact IT and get a daily PIN code. The PIN code is a code the client and server know without having communication. The PIN code will appear in the left menu on computer details in the inventory if you enable approval mode.