It does but WCF is deprecated (that’s my understanding), so either I’m using a wrong implementation of it or something else. Apparently you can re-enable WCF Services, mentioned here. KB0120930 for those who don’t want to read the post C# Customization Error After Upgrade - #31 by SteveFossey. Others do provide alternatives…
I’m not a fan of enabling something that Epicor has deliberately disabled…
Perhaps this one becomes another Podcast…“Upgrades from the Trenches” or something similar.