Older versions of remmina don't understand the line administrative session:i:1 in files produced by the azure portal, so you either need to upgrade remmina to a more recent version of comment out that line in the file (prefix with # works).
Older versions of remmina don't understand the line administrative session:i:1 in files produced by the azure portal, so you either need to upgrade remmina to a more recent version of comment out that line in the file (prefix with # works).