I would like to be able to update a Web Service's source simply by swapping the URL from the Data Source pane in the Layer Properties.
![](/legacyfs/online/437761_pastedImage_2.png)
Also, Set Data Sources does not appear to work for Web Services. While I have setup the server connection in my project Catalog as shown below, when I try to change the data source by using one of the services from this server connection, all folders appear to be empty.
![](/legacyfs/online/437760_pastedImage_1.png)
![](/legacyfs/online/437766_pastedImage_4.png)
I would suggest an easy URL swap just as can be done in the ArcGIS Online Assistant with web maps!