Templates can be released and expired from Manage Templates page in the Templates app. They can also be re-released if they've been expired. Click Release Now to release a template for users to customize or Expire Now to discontinue allowing customization.
You can schedule release and expiration dates for templates from the Document Details page. Schedule a release date for templates that are newly uploaded (and therefore unreleased) so they're not available to users until you review and release them.
Schedule an expiration date for a template for some time in the future. For example, if you wanted to make a product sheet available only until the end of the year, add the expiration date of December 31.
Designers can also remove a template entirely from within InDesign.