Mm,

Are you in "singleBanch" mode ?

What about "IndependantBranches" system pref ?
If set to yes,
The search gives only results in the branch of the connected user.
In advanced search page, the branch is automatically selected.
But you can select another.

Regards,
--
Fridolyn SOMERS
Information and Communication Technologies engineer
Lyon - FRANCE
fridolyn.somers@gmail.com