Apply Custom Rule to "extension "

Many of our users have custom rules with a custom voicemail greeting. They use them for "out of office", "in a meeting", "out to lunch", etc. When a Custom rule is applied, the custom greeting is heard by callers dialing the DID and through the main line but anyone internal who dials that user's extension does not hear the custom greeting. They only hear the user's standard greeting.

Currently the "extension" is not listed as one of the conditions in Custom Rules so we cannot select it. This would be very useful to have this feature. Thank you for considering it.