We parse the email alerts so it attaches them to the correct company.
Alert for{company} -{sitename} -{problem}
All of our networks are named with ClientShortName - Site so it looks a little messy in Meraki as you have the client Organization and then listed again on the site, but it works for ticketing.
Also:
Scheduled maintenance for network "{company} - {sitename}"
Scheduled maintenance for * networks in organization "{company}"