Calling a PM about an off-market deal?

[Rivers Plowden]

I have a property that I am underwriting that I received from a broker as an off-market listing. I would like to call the PM for the property and ask some questions about how it is managed. I've tried to ask the broker, but they haven't returned my email just yet. I want to make sure this won't be stepping on toes or creating any sort of conflict.  

I'm probably over-thinking this, but afraid of making an amateur mistake.

Thanks.