Every time I visit ArcGIS Server Manager page (https://domain.org:6443/arcgis/manager/site.html ), I get "Your connection is not private - NET::ERR_CERT_AUTHORITY_INVALID" SSL error in Google Chrome browser. I purchased "Thawte SSL 123 Certificate - Domain validated" certificate and binded with IIS on Windows 2016 server for my ArcGIS Enterprise 10.6. This problem don't occur when I visit the portal (https://domain.org/arcgis/home/organization.html). Problem seems to be with the port number in the URL.
Can someone guide me how to debug and fix this problem? I can provide more details if needed. Thanks in advance.
Ideally you should be able to import the same Thawte certificate into your Server and then configure it to use that certificate. The documentation on how to do this is here: Configure ArcGIS Server with an existing CA-signed certificate
An important thing to consider though. This assumes the domain name for your ArcGIS Server matches the domain name where the IIS web adaptor is installed. The certificate that was purchased from Thawte is likely for a specific domain name (ex server.domain.com). If the domain names do not match, you can't use the same certificate (unless a wildcard certificate was purchased or the server domain name is listed in the subject-alternative name for the certificate).