You should contact Guest Link support so they can provide you your unique reference for your units - (0844 209 2555) There may be charges for calling so please check on the site beforehand so you are aware of any fees.
NOW GO TO YOUR PROP-SYNC ACCOUNT
Once logged into prop-Sync, go to settings in the top tool bar, then scroll down and select unit you wish to link the calendar with and choose “Guest Link”.
In the box it will request a reference which you should have retrieved from Guest Link support. Insert the code here, e.g. 998D1353 and register to synchronise.