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If a list allows it, and the user is in the eligible population, users can opt in to a list. Or maybe they can just opt out. This process is a little complex and requires a friendly UI. An example of the complication is when a user wants to opt in to a list. If they are in the automatic population, and in the opt outs list (due to previously opting out, or for some other reason), then the correct action is to remove them from the opt outs list. But this is not intuitive for end users and would be time consuming for support staff to do on their behalf. So a Grouper GSH template is used to make a UI to do the correct logic. A recent enhancement to GSH templates is the “simplified UI” which removes all unneeded Grouper UI stuff and leaves only the part that the user needs. The drop down of lists to subscribe to only has lists that the user is allowed to opt in to.
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