When attempting to configure a relational data store for an ArcGIS Data Store update in the Data Store Configuration wizard, the configuration fails, and the following error message is returned on the Prerequisite Check page:
Error: Error at index 4 in: “6443”
The local host is used when accessing the Data Store Configuration wizard instead of the machine name. For example, the URL used is https://localhost:2443/arcgis/datastore.
To resolve the issue, use the machine name to access the Data Store Configuration wizard. For example, https://<machineName>.domain.com:2443/arcgis/datastore. Refer to Portal for ArcGIS: Upgrade ArcGIS Data Store for more information.