I have an issue with ArcMap 10.8.1 connect to Portal for ArcGIS 10.8.1. All machines are in the AWS environment with a proxy server settings.
After setup the portal connection in ArcGIS Administrator. The ArcGIS Connection shows connected but the Sign-In option of ArcCatalog and ArcMap are still greyed out.
Suspect on the issue that the ArcMap cannot verify the Portal's certificate as to connect to Portal via ArcGIS administrator or ArcGIS connection it prompts the security warning about the certificate.
Use Fiddler on the desktop machine it shows 403 vaulttest.domain.com:8200 (access is forbidden)
Not sure if this will prevent the connection from ArcMap to Portal?
if so, should every desktop where using ArcMap requires to open 8200 port from each desktop to the vaulttest.domain.com issued certificate server?
Is anyone aware of what 8200 port? does this is using by ArcMap