Few questions have come up recently from customers upgrading to latest Horizon from older Horizon releases, I want to post them here for reference.
First is important changes in UAG 2312.x and newer:
https://kb.omnissa.com/s/article/96373
Please review this KB and if you are seeing HTTP 400 errors after upgrading, see the "Changes in Host Header Validation" section of that document.
Second is if you are upgrading from Horizon 2207 or older, there is a new setting in the UI for "Enable Host Redirection" so please review your locked.properties file and the new setting:
Enable Host Redirection
https://docs.omnissa.com/bundle/Horizon8InstallUpgrade/page/EnableHostRedirection.html
Also see:
Update sequence for Horizon 7, Horizon 8, and compatible VMware products
https://kb.omnissa.com/s/article/78445
VMware Horizon 8 Upgrade Overview
https://docs.omnissa.com/bundle/Horizon8InstallUpgrade/page/Horizon8UpgradeOverview.html
