In order to send custom reminder messages, you must have a CLOSEM account.

Here you can sign in and integrate with your Google Calendar.

Here is where you can log in and integrate your Apple Calendars with an app specific password.

Here is where you can sign in and integrate with your Outlook calendar.

Here is your BOOKM API key, you will need this to integrate to other apps.

If the service has the global hours activated then the available hours will be the global hours and will check for non-available times (within the global hours) via your calendar integrations (google apple etc)

If the service has its own available hours then it'll use those hours instead the business hours and will check calendars.

Integration Settings