We have 2 Bike computers Edge 1030 & Edge 800 and 2 watches Forerunner 945 & 735 XT.
2 devices are registered to me and my Garmin Connect account and I recently changed the registration of the other 2 to my daughters separate Garmin Connect account.
But there is only one Garmin Express app. The Garmin Express PC app does not have a Login and shows all four devices. My Edge 1030 is syncing on Garmin Express but the activities are not uploading to Garmin Connect on the PC. Additionally I created a Bike Workout on my PC and can't download to the Edge.
I only started to have this problem when I removed the older equipment from my account and registered in my daughters account.
In Garmin Connect when I try to click on the Sync Device icon it wants me to download Garmin Express again even though it's installed and running.