I have been implementing SSO with AzureAD on our Meraki environment.
Could not find how to login as no SSO option was visible at the dashboard.
It appeared Meraki doesn't support client initiated login ??
I've found on another site: Identity Provider (IdP) initiated sign-in. You will not be able to sign in directly from the Mearki dashboard, you will need to sign-in via https://myapps.microsoft.com/ or your Office 365 portal or you can find a direct URL for the app on theManage => Properties section on the Azure application in the “User access URL”field.