When opening an emails sent through Blackbaud Sphere in AOL's software, the links are not clickable.
In AOL's software, whenever you receive a new mail from an unknown sender, all the links are disabled by default. This option can be changed in AOL account settings. On top of the mail body you will notice two options 1) Enable links for this message 2) Enable links always for this sender. Select one of these options to enable links.