How to authorize more than one device on my adobe digital editions Ebook reader

I have a computer, iPhone and iPad, and can't read a downloaded ebook (EPUB) on more than one device  at a time. If I try to open the item on my Overdrive account with a device other than the one I originally used when I downloaded the ebokk,  it gives me an error code "Fullfill  2004. This license has already been fulfilled by another user".  When I contacted Overdrive Media  they explained that I need to contact Adobe to authorize my various devices to have access to my Overdrive account which utilizes Adobe digital editions 4.0

‌Please provide info on how to authorize my additional devises to have access to downloaded e-books  on my overdrive account