Management tools
In addition to using the administrative settings in Portal and the Portal Admin, there are solutions available to assist in managing your Portal content.
AGO Assistant
ArcGIS Online Assistant, or AGO Assistant for short, is a web application created and hosted by Esri that can be found at https://ago-assistant.esri.com/. Esri calls it A swiss army knife for your ArcGIS Online and Portal for ArcGIS accounts, which sums it up quite well. AGO Assistant uses the ArcGIS REST API to work with content in ArcGIS Online and Portal for ArcGIS through a simple interface. Some of the tools available include viewing the underlying JSON for any item in your Portal or ArcGIS Online (a personal favorite of mine), copying content from one account to another (Portal to Portal, AGO to AGO, Portal to AGO, or vice versa!), and updating service URLs in web maps and applications (another huge timesaver). Let's take a look at some ways to use AGO Assistant for administrative purposes.