Currently all trusted app domains must be listed fully qualified in the manifest, e.g. <AppDomain>https://customer1.acme-eu.com</AppDomain> <AppDomain>https://customer2.acme-eu.com</AppDomain> ...
Hi christian-sap​, Could you please share more details about your workaround? I'm particularly interested in how you're currently delivering the add-in. I assume publishing it to AppSource isn't an option—am I correct?