Could anyone help me understand why we are getting a system unavailable message while trying to access the prod author instance. Is this adobe maintenance? 

I am new to aem form so please help?How is the client-side and server-side validation done in aem forms exactly?I have seen that there is a pattern field where you can give regex patterns to validate but how to add more complex business logic validations.I have seen that in the code editor we can wr...