I installed it ... it worked "out of the box"

Only pitty no support for joom!fish, but hee ... i found for my goal a workaround, this even works better as i thought !!!

Support/Email, really great and friendly.

With other words, guys keep up the good work !!!!

also this one does not work with google apps.

This means that worse case a info will show up that some appointments will not be shown due to security reasons :-(