Hi Susan, It is unlikely that the software has issues regarding with mixed content as this seems to be working well for other organisations thus not recommended. There might be issues consuming WMS services that weren't created by ArcGIS since this is just a capability on top of a Map Server. However, this has not been confirmed by Esri as mentioned. The same in regards to consuming a GeoRSS feed. Both these issues are not related to mixed-content at least directly. This can even be caused due to the URLs not being formatted as expected as this is not very well documented. Lars suggested adding the WMS without the getcapabilities. I haven't tried so am not sure if this will work for all cases/software releases. Your issues can come from many things including firewall restrictions, security policies, browser limitations, the portal proxy denying the communication, SSL certificate errors or even because we don't know how the software expects that the URLs are formatted. This is not very well documented. Can you login to a machine using an account with admin privileges and attempt to consume the resources? It might happen that the firewall is preventing your user from performing calls to external HTTPS content or mixed-content. Cheers, Jose
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