Installed ArcGIS Server and Web Adaptor 10.6.1 (Windows Server 2012R2, and IIS 8.5) and now attempting to configure the web adaptor to work with server. When I go to https://localhost/ags/webadaptor, I get the IE "this page can't be displayed" window. Also tried to configure WA through command line, and received an error "WebAdaptorURL does not exist." I suspect this is an certificate issue but unsure how to proceed. Any suggestions?
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