Ok ok. The signatures for BES and BIS are entirely separate. Editing/removing one does not impact the other. If you're using both BES and BIS and you don't want the default signature on either you'll need to change it in both (actually more than one for BIS if you have more than one email account integrated with BIS) places.
Again, BIS and BES are entirely separate and do not interact with each other. Signatures are not an exception.
Originally Posted by kooljacks
PS : Im not talking about the signature.
Someone already said this but you are talking about the signature. Again, check both places.