To link your Bkool account to your Garmin, Strava or TrainingPeaks account, just go to My profile and activate them.
The sessions are only synced from the time the accounts are linked, so any sessions done earlier will not be synced.
Synchronization with Strava and TrainingPeaks is done in both directions (we receive your activities and send those you do in the simulator). In the case of Garmin, we only receive the activities that you carry out, we cannot send them automatically. This is due to the fact that Garmin does not allow the sending of activities automatically. They are working on allowing synchronisation for all their partners, nonetheless at present this is not possible.
If you wish to export sessions from Bkool to Garmin, you will find the button to export sessions by entering your History and selecting the session you wish to export. Once you are inside the session, above the map on the right-hand side you will see various buttons - the arrow is to export the session. Then import it afterwards on the Garmin Connect website.