: Use (Get-WebApplicationProxyConfiguration).ConnectedServersName to confirm the list is updated.
Even after uninstalling the role, the AD FS proxy trust entry may remain. Removing it is optional but recommended for a clean environment. remove web application proxy server from cluster
Before executing any commands, complete these preparatory steps: : Use (Get-WebApplicationProxyConfiguration)
to automate the removal and certificate cleanup for multiple nodes? PowerShell: Reset WAP Configuration - Master & CmdR remove web application proxy server from cluster
# Certificates used for proxy trust certlm.msc → Personal → Certificates → Delete any issued by "AD FS Proxy Trust CA"