One of the harder things to do in Adobe InDesign, surprisingly for a page layout tool, is to create multilevel or outline format numbered lists. The right way to accomplish this, according to the folks at Adobe, is to create a Style for every level of the list you’d like to have! Here are Adobe’s instructions on how to do so (This content is taken directly from https://helpx.adobe.com/indesign/using/bullets-numbering.html#create_multi_level_lists):
Microsoft Publisher, the desktop publishing component of the Professional version of the Office Suite, can perform many time-saving tasks for busy business owners, including layout and design work. It can even help you avoid a shopping run to try to find tickets for your next employee picnic, holiday giveaway or executive board meeting. Create your own tickets, including the vital sequential ordering needed for raffles or attendance tracking, using Publisher’s page numbering. With a few tricky manipulations of the page number process, you can start running the numbers in an entirely new fashion.