FTP Bounce prevent instead of inactive ?

Hi,

I get an issue with an IPS on the customer environment.

We have a global rule with parameters with Prevent mode.

I would like to make an exception on smtp flow to Exchange server, and put this exception to Detect mode.

However, instead of the Detect mode configuration, I get a prevent...

If I put the same rule in inactive mode, this is inactive.

Someone can explain me this behavior ?

I have already open a ticket to TAC, but nothing for now....

Thanks for your help guys!

Arthur