Collecting monthly availability from external contacts

Cie
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Hello,
I would like to set up a monthly notification to go out to candidates to obtain their availability.
I would have a list of contacts- the contact should receive a form in which they would be providing their availability to join a project. Let's say "available from April 15th to April 30th. This information should feed back to the list of contacts automatically as they respond. How can I achieve this?
Answers
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Have you looked into sending an Update Request instead?