I just received an update on the case we had open with Meraki from the support engineer:I have looked into this more, and it looks like that hash file is being flagged as malicious by Talos Intelligence, and we have already opened tickets with them t...

Same here, all of our MX's threw alerts yesterday regarding this file and I have seen no other posts on it other than this one. I also opened a Meraki case however they were less than helpful responding "Occasionally the MX appliance may block a file...