Once the group is created you will need to add the appropriate SAML2 EntityIDs for your web site to the Manifest group per https://kb.wisc.edu/page.php?id=27776
Ensure that you have populated the group with the appropriate privileges and added people to the membership of the group:
Make note of the full path to your Manifest folder/group that you wish to protect (avoid using spaces in the group naming)
Example:
Specify which location(s) you wish to protect to which group(s) i.e. root of the site, subfolder(s), specific files, etc.
Email the webhosting@doit.wisc.edu the Manifest path and the locations to protect and we will make the configuration on the server or customers can also protect locations via .htaccess