AutoPilot with Group Tag - 24-hour activation link

I have a customer that is asking to extend the 24-hour time period to enable AutoPilot with Group Tags. Dell provides a link that is active for 24 hours. However, if this link is sent over the weekend, my customer is unable to activate it during that time period. How can we extend this from 24 to 48 hours to ensure the activation is still live? 

Thank you in advance for your help.