Create Hide folder inside office 365
With the VSTO and exchange WSDL we have avaibility to create an hidden folder for move mail inside. Whis this feature we have developped an plugins VSTO for a french company and a french law for disconnexion of numeric tools. With the office 365 api, these only parameters that can set when we create a folder is the display name and a single-value extended properties. I have create a folder with a display name, this folder whan correctly create with the name. I have update this folder with the single-value extended properties like in WSDL
"id": "Boolean 0x10f4",
we get an 404, the folder disapear of the folder tree view inside the office 365 user account, and when we create an other folder with the same name, we get an error saying that a fodler already exist with this name.
I think's theses features is not completly implemented because one time the folder is hide, we can list them and request them even if we have the uid of this folder.
Mark Wickens commented
Adding a simple summary of what I think is the issue described here (which is also ours): We can't view or delete hidden folders, even ones we create.