Forum Discussion
Hybrid Exchange change of SMTP relay connector
Whenever I setup a connector for this purpose on an Exchange 2016 Server, I always set the security tab options as follows;
I would definitely double and triple check your firewall rules too. Do you definitely have the Exchange Online IP's all allowed for the Exchange 2016 server?
Hmm, that's interesting. Are you able to share a screenshot of the receive connector you have created on your Exchange 2016 server please?
Also, could you share the socket error you are seeing too?
PeterRisingthanks for the reply
this is the receive connector (screenshot) and under security we have marked ONLY - Anonymous
Scoping is the internal printer network
Looks like the receive connector on the Exchange 2016 is ok, but then if try to open SMTP 25 to Outlook.office.com from the Exchange 2016 all I am getting is blank screen and nothing else. When I try to do the same from the old 2010 Exchange box it all works perfectly. As I said on the FW both boxes have identical rules. Not sure why EXCH2016 -> Outlook.office.com:25 not working