I have a client who is looking to white-list IP addresses, for some reason.
After some reading, it seems like we can white-list IPs in Exchange through Receive connector or using IP list providers as per link below
My client does not have edge server, instead has multiple HUBs cas, and MBXs in a DAG, a relay server [third party application]
As per link above, MS does not recommend to apply list providers on HUBs,
Can you please indicate all steps to whitelist IP addresses in Exchange 2010 using both methods, and indicate your preferred one? what are the best practices for companies that do not have edge servers
What about the scenario for EXCHANGE 2013 servers? 2 CAS/ 2MBX in a DAG
Please, consider both exchange versions, and all options to white-list IP addresses, pros and cons