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Send vs. Receive Connectors
I am having trouble wrapping my head around the difference between a Send Connector and a Receive Connector in my Exchange 2010 hybrid server. Is there a definitive resource online that someone could point me to?
There can be other uses too, but that's kinda the definition, yes.
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One handles inbound mail flow, the other one outbound. The ones created when sing Hybrid make sure that all traffic between on-premises and Exchange Online is encrypted.
You can refer to the TechNet documentation for more details: https://technet.microsoft.com/en-us/library/jj657461(v=exchg.160).aspx
The thing I can't really wrap my head around is why this statement in my internal KB:
I'm assuming that's for the scenario where you want to use this application to sent/relay messages via Exchange. Thus, it needs to be allowed on the receive connector first.
