In IBM Connections Searching for Restricted and Restricted but Listed Communities is inconsistent.
The steps to reproduce are as follows:
Create a new restricted community.
Mark this community as searchable in the community settings by selecting the checkboxLet anyone in my organization see this community's title, description, tags, and owners and create the community.
Send somebody who is not a member of the community a link to the community. When the user accesses the link they get an Access Denied message