Hello @frankt,
Welcome to the TeamViewer Community!
Connecting to version 13 requires a license.
Free connections are only possible from version 15 to version 15.
Hope this could help.
/JeanK
Have you heard?! On October 21, we’re hosting TeamViewer Rise—and we want to see you there! The digital event dedicated to IT experts. Join us to hear industry leaders as they share demos, roadmaps, and real-world strategies for delivering better IT. Take part in our first annual event for Proven, ready-to-deploy…