What you should know about xbook.info Activation Licensing service. xbook.info is not a Windows system file and is known to frequently cause computer problems. The file xbook.info is found in a subdirectory of . They can also be damaged through a Time Machine system restore. FlexNet service licensing failures cannot be resolved by reinstalling the application or by using the Adobe CS5 Cleaner Tool. If permissions issues prevent the FlexNet licensing service from launching, accessing data, or communicating with Adobe processes, a licensing failure occurs. File: xbook.info xbook.info is the bit license authenticating service provided by FLEXNet Publisher. This is not a standalone process and comes bundled into many software tools that either need or recommend license activation.4/5(57). What to do when FLEXnet Licensing Service unexpectedly stops, Licensing for this product stopped working message recovery. How do I setup Adobe Reader XI with flexnet license server to share 5 license with 10 computers?. Each Adobe CS3 application attempts to load an instance of the FlexNet Licensing service. Windows does not allow multiple instances of identically named.