QUESTION:
I want to create a matching rule on a multi-select pick-list field but it does not show in the list of available fields to pick from. The field is visible for my profile, so why can't I select it?
ANSWER:
Multi-select pick-list fields can be up to 4000 characters long and only EXACT matches would be able to be found. Therefore, we do not allow them to be used in a matching rule. Regular pick-list fields can be matched, but not multi-select pick-list fields.