I have a user who's cached trash was deleted automatically (items older than 7 days) even if the manual setting was defined in C1.

The thing is that this is the HR Vice-President and that he was sorting his old email in the trash. and losing some old thrased email was not acceptable.

Anyway, he asked me to find a solution so that this doesn't happen again.

So after making some tests, here is my conclusion:

If the trash is forced (C1) on manual deletion in online mode, and you create a new caching, the trash mode is set back to auto delete after 7 days.

Is there anyway to make the caching use the online trash settings ?

Thansks in advance !