access SSID and the change password?

[Antonio78]

Good morning, Is it possible to create a guest SSID where the user registers with their data, is authorized to use WiFi and where the password change is required every 30 days?

[alemabrahao]

Natively, Meraki does not offer this feature. You can create a user with an expiration date, or use a voucher with an expiration date, but it does not allow for auto-renewal.

[alemabrahao]

Other option is use the SplashAccess https://www.splashaccess.com/ 

[PhilipDAth]

You can use the guest self-registration system (if you are using a splash page).

https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Self-registration_for...

I am not aware of any built-in system for making a user change their password based on time elapsed.

+1 to @alemabrahao .  Splash Access is very good.