Allow someone with freebusy permissions to see the hierarchy of collections but not the items within them.
Allow someone with freebusy permissions to see the hierarchy of collections
but not the items within them.

lkraav/davical-rss-feature-branch,lkraav/davical-rss-feature-branch,lkraav/davical-rss-feature-branch,lkraav/davical-rss-feature-branch