More then 500 candidate in candidate search witout application

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Hello,

in one day in the test environment i found in the candidate search more then 500 candidate. I don't know how it is possible because i never made application with this people. Moreover all of them are employee of the system. It seems like in one day all the employee populate the candidate search?

Have you ever face this things? How they arrive in the candidate search?

We are not live yet and this happen in the test environment

 

Thank you,

Giulia