Steinberg Dorico / Musecore comp files being marked as Malware by Exchange Online

[Maus]

Hi all

 

Obligatory 'I don't know where this should go because it covers so many areas'..I've been encountering an odd problem with files creating in Steinberg Dorico music notation software.. whenever any of our staff sends them as an email attachment, Microsoft Exchange Online protection wrong thinks the files are .jar malware. This is true for any Dorico files from any computer, sent from any mailbox (internal or other external services). Weirdly we get the exact same issue with another package called Musescore (maybe built on a common library?), but both sets of files are cleared by literally every other anti-malware system.Has anyone else encountered anything like this? Microsoft support seem to not comprehend the concept of a false-positive.. for obvious reasons I'd rather not just turn off detection of .jar files..Many thanks!