Once the CNAME is added, Branch auto-generates an SSL certificate and AASA file for your click tracking domain. It may take up to an hour to resolve SSL errors once you change the CNAME. During this time, link redirects on the click tracking domain will redirect to https://branch.io.
If you are making this change to a live domain with active email click traffic, schedule the CNAME change to occur during off-hours with low click traffic.
Updated over 2 years ago