Document Information Panel in office 365 apps + open by default

Vertebre85 

I reply partially to myself so it can help other if required.

WIth PNP powershell, we can retrieve the XML schema for the content type

$data = Get-PnPContentType -Identity 0x01010028739CF52E3CB54CB6EA0883DB4E825D
$data2= $data.SchemaXml

i should change the value "openByDefault" from True to false at the end of the schema

is there a proper way to do it? Pretty new with powershell and not sure how to update it correctly.

Probalby something with ".Context.ExecuteQuery()" and so on, but with the Schema containing " and ', i'm strugling to update it