Hi, myself and my team are using the 2015 release of Creative Cloud and are all using identical windows PC's running Windows 7.
After creating a graphic in Illustrator and adding it to the library I've selected collaborate and added a colleagues email and sent an invite. However the invite remains at a 'pending' status and then becomes invalid.
Image below shows the pending screen which can stay like this indefinitely.
Image below shows the invitation no longer valid.
I've tried the same with others in the team with the same result. This would be a great feature for us as we use a lot of repetitive symbols and sharing a library would make things easier. I would be grateful if anyone had any suggestions.