Answer 1

Hi Perry,

By default, the SQL server  Manager Studio(SSMS) uses the following way to connect  to a report  server instance:

There is a little different between the returned URL and the URL you used(http://localhost/ReportServer). The returned URL should be: http://<machinename>/ReportServer. This URL is same to the URL we can get from the "Web Service URL" in the Reporting Services configuration  Manager.

In this case, in order to troublehshoot the issue, please make sure we can open the report server by using http://<machinename>/ReportServer (from Internet Explorer). If so, we may be able to connect to the report server by using the server name too.
However, if we are not able to connect to the report server, please check the authentication configuration settings. If we are using Kerberos authentication, please make sure the Service Principal Name(SPN)s are registered correctly.

If you have any more questions, please feel free to ask.

Thanks,
Jin Chen

Answer 2

Hi Jin Chen,

I able to connect  using the following in IE.

1) http://<machinename>/ReportServer

2) http://localhost/ReportServer

can you please help  me on this --> please check the authentication configuration  settings.  If we are using Kerberos authentication, please make sure the Service Principal Name(SPN)s are registered correctly.

Thanks,

Perry

Answer 3

Hi Perry,

Do you use a proxy in the network? This means configuring the machine to use a proxy to access the network.

Thanks,
Jin Chen