Hope below doc links helps you in achieving the same.   https://documentation.meraki.com/MR/Splash_Page/Splash_Page_Overview   https://documentation.meraki.com/MR/Encryption_and_Authentication/Meraki_Cloud_Hosted_Authentication   Configuring a Custom-Hosted Splash Page to work with the Meraki Cloud ... View more

Hi Phil,   There is nothing as such mentioned in docs of Meraki-SM, I think so you can use any AV and AM Solutions.   If you are looking for something in Advance AntiMalware, check with Meraki Security Appliances Advanced Malware Prevention (AMP). ... View more