Hi Erik,
like with all other "remote systems" you need to create a HTTP destination [1] (to IoT MMS in this case) so that WebIDE can connect to it. Very briefly, the procedure looks as follows:
1. Create a HTTP Destination (on account level), pointing to IoT MMS instance, (OData API is protected either with Basic or OAuth). Do not forget to add WebIDE "additional parameters", i.e WebIDEEnabled (equal to true) and WebIDEUsage (equal to odata_gen). See more here [2]
2. Create a project in WebIDE from Template, in "Data Connection" wizard step, select "Service URL" and then choose your destination from the list, follow the wizard.
[2] SAP Web IDE Developer Guide
Regards,
Anton
