Issue with allowExternalSenders property in groups
I saw that setting allowExternalSenders property through POST/PATCH method is currently not working with v1.0 and beta. Do you plans for making it work any time soon? It is very tedious to set it manually through the UI.
We are currently investigating this.
We are using the Sharepoint API as a workaround (for creation of groups). It's horrible because it takes forever to make a connection, so we do group creation in batches...but at least it gets the job done.