It is whatever server its connecting to, for us we are using NPS for RADIUS. But I did test the Meraki one, pretty sure it only worked when using the full one for the current network. I think not being able to use wildcards is an Intune limitation. You can have multiple entries in the Intune WiFi configuration, so you can list all the entries for all the different Meraki sites (not sure if there is a maximum you can specifiy). Just make sure you also upload the root CA and specify it in the profile as well, as shown in previous screenshot.
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