How old is the template? New templates now support the MG21 (You can create a new template, split it and then combine the MG part with your existing template) Having said that I've had to do the steps above with the API as the dashboard demands an en...

I'd check the hash against VirusTotal and the other sites like it

The documentation is good if you are new to SM or Meraki in general, give the SM documentation a read here

Systems Manager > Settings > (Click existing profile (Or create a new one)) > Add Settings (If not already added to the profile) > Restrictions