@Philippe-Parys
This is news to me. I hadn't realized that MRA Routeplanner didn't have collaborative capability. I generally don't do group rides where I might want to collaborate. So, I guess it's not really surprising that I would be clueless on this. Meh... Anyway...
I know some hate it when I mention another route planner in this forum... but... Furkot has this capability. If indeed MRA Routeplanner doesn't have this capability, and it's important that you have this capability now, you could go check out Furkot to see if it will fill the bill for now...
Furkot
This is the help page that describes the collaborative capability you are probably after...
Share your trip
If you like you could collaboratively plan your trip in Furkot and then import it into MRA Routeplanner etc. You could do final tweaks in MRA Routeplanner - select appropriate map for target device (HERE for MRA Navigation for example), verify mapped route matches planned route etc. You might import both the route and track from Furkot. This will allow you to use MRA Routeplanners ability to overlay the track on the route. This might be helpful in verifying that the mapped and planned routes exactly match. Etc. Etc. Etc...
Anyway... for what it's worth.
