We currently use analytics.js for cross domain tracking. I need to migrate our Universal Google Analytics tracking to go through Google Tag Manager.
I set up the Universal Google Analytics tag and then in more settings added "Fields to Set" field name=allowLinker value=true. Also, in Cross Domain Tracking, I added our two other domains in the Auto Link Domains field.
I am wondering what else I need to configure to ensure a smooth transition to capture accurate data. Thanks for your help.