Unable to register the ArcGIS Server with the Web Adaptor. Please make sure that the server machine is running and that the account specified has administrative privileges to the site

Error Message

When silently configuring the web adaptor, one of the following error messages is returned.

Error:
Unable to register the ArcGIS Server with the Web Adaptor. Please make sure that the server machine is running and that the account specified has administrative privileges to the site.

Error:
Unable to register the Portal with the Web Adaptor. Please make sure that the server machine is running and that the account specified has administrative privileges to the site.

Cause

This error may occur due to one of the following reasons:

• The ArcGIS Server or Portal URL specified in the command is not accessible due to a firewall, the site not being configured, or the Server / Portal service is stopped.
• There is a problem with the credentials specified in the command.

Solution or Workaround

To resolve this issue, depending on the cause, use one of the following options.

Ensure the site is accessible from the web adaptor machine.

1. Open a web browser on the web adaptor machine and access the ArcGIS Server or Portal site through the internal URL (https://server:6443/arcgis or https://portal:7443/arcgis).
2. Use the curl or wget command (for example: curl http://server:6080/arcgis or wget http://server:6080/arcgis).

Ensure the credentials are correct.

1. Sign in to ArcGIS Server Manager or Portal Home using the same credentials.
2. Check if the password has special characters, such as, $, -, #, and so forth. If so, use an escape character backslash (\). For example, if the siteadmin password is "my-pa$$word":

./configurewebadaptor.sh -m server -w https://webadaptor.esri.com/arcgis/webadaptor -g https://server.esri.com:6443 -u siteadmin -p my\-pa\$\$word -a false