Why confluence "guests" are unable to mention @ in comments?

[Erwann Peu]

I have invited a few gests to view one dedicated space on our Confluence, but they are not able to mention (@name) anyone when they post a comment on a page.

Is is a setting that need to be enabled somewhere?
Or is it impossibe to do for "Guests" profile on Confluence?

[Kian Stack Mumo Systems · Accepted solution]

@Erwann Peu, 

Confluence does not provide access to the people directory for guest users. From the Atlassian documentation:

Guests have limited access to internal user info

Confluence blocks guests' access to the people directory, which contains site-wide user information.

Functions that query the people directory of the entire site include:

• @ mentions

• the Teams tab in the top nav bar

• user search

• user pickers

These are systemically blocked for all guests.

[Erwann Peu]

Thank you @Kian Stack Mumo Systems for this clarification.

[cmeyerkelly]

Well, what is the workaround or solution here? If I cannot get this feature to work appropriately, I may have to scrap my entire project and use another tool. 

[Erwann Peu]

"Guests" profile can still add comments on each page they have access to, but they cannot mention ("@[Name]") in comments.

However "Users" profile (paid licences) can do it though.