Call the court clerk and they can usually tell you. Does the order indicate it's requesting an abridgement of service?
What's the "emergency motion" for? What is the court date? Judges don't look kindly on motions filed for frivolous/non emergency reasons. Basically the only time you can pull an emergency motion is when the health/welfare/safety of a child is in danger.
Not sure if this is relevant or not..but How do you get a Court Order for Emergency Child Custody in Ontario Family Court? | John P. Schuman C.S., Child and Family Law | John P. Schuman points 13, 14 and 15.
So I'd say within 3 days BEFORE the court date.
Respond as soon as possible.I've had an emergency motion served on me...how long do I have to respond?
Respond as soon as possible.
As the respondent, you need to serve and file your material four days before a motion; or by 2:00 p.m., two business days before, with consent to late filing.
If you cannot do the above, serve it on the other party as soon as possible and file the material over the bench. If you have been short served for the motion this may may be appropriate, depending on the timing.