what will happen when “Expiration Date” is up ?

Summary:

when we create an initiative and publish, system will send an email to invite supplier to response to questionnaire. there is a “Expiration Date” in email, but it seems that it is not work? even after "Expiration Date", supplier also can response to questionnaire.

and another, how can we setup a date that supplier cannot response to questionnaire any more?

Content (please ensure you mask any confidential information):

navigator:

1.) crate a "Qualificaion" initiative and publish

2.) system will send invited email to supplier

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):