If you host your NetCommunity site:
You will need to generate a XML sitemap file and place that file in the root directory of the NetCommunity installation on your NetCommunity web server.

If your NetCommunity site is hosted by Blackbaud:
You will have to generate an XML sitemap file and provide it to a NetCommunity support representative.  They can have the file placed in your site's root directory.

Click Chat with Support and reference this article.

If possible, provide the XML site map file as an attachment in the case.