We have a number of discrete App Service Plan instances (separated to simplify tenant billing), each hosting a number of Web App instances. Each App is on a subdomain of the same parent:
AppService-1:
subone.mydomain.com
subtwo.mydomain.com
AppService-2:
subthree.mydomain.com
&c...
Can we purchase a single wildcard SSL certificate (from Azure, or elsewhere) for *.mydomain.com and apply it to all three subdomains in the example above, or do we need a separate certificate for each App Service Plan?