I need to transfer the Acrobat XI license from this PC to a new one for a user. I don't have the liceanse number or the media. What are our options?

Lost information - reply #1 in https://forums.adobe.com/thread/2008767

Download & Install instructions https://forums.adobe.com/thread/2003339 may help

-includes a way to go to a page to download Adobe programs if you don't have a disc or drive

-you will need to enter your original serial number during install for non-Cloud programs

-Cloud desktop http://helpx.adobe.com/creative-cloud/help/creative-cloud-desktop.html

-Cloud Getting Started https://helpx.adobe.com/creative-cloud.html

-Membership questions and problems https://forums.adobe.com/thread/1146459

-or kglad links in reply #1 here https://forums.adobe.com/thread/2081216 may help

Also go to https://forums.adobe.com/community/creative_cloud/creative_cloud_faq