How is it possible to connect CONNECT THROUGH SYSTEM in a PDB..

hello Guru,

My database is in version 12.2, and and my database has a CDB and a PDB...

When i have not CDB and PDB it is working

I am connected on my PDB by :

 alter session set container=PVDXYZ;

and i would like to connect on an other user ..

 ALTER USER WINDXYZ GRANT CONNECT THROUGH SYSTEM;

 connect system[WINDXYZ]

Enter password:

ERROR:

ORA-01017: invalid username/password; logon denied

But i am sur my password is correct...

How is possible to connect WINDXYZ ?

i hope i am clear...

thank you for yours helps...

JP