Version : ArcGIS Enterprise 10.8.1
How to make sure Create an Account page are access through HTTPS only when disable Allow anonymous access to your portal .
This only happen when use same network or access through VPN. If I access the page through outside network, it will redirect to HTTPS protocol.
Anonymous Access Setting | Disable anonymous Access | Enable anonymous Access |
Setting > Security |  |  |
home/signup.html | 
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