Disable external access to ECP and OWA Exchange 2016

[talahmadi]

Hi, 

I want to disable public IP that is related to Exchange and it can be accessible to access owa and ecp from this public IP  

only I need access to owa and ecp once I log in to (mail.domain.com) 

Why public IP it can be accessible and what should i do? 

[#2]

@talahmadi 

I do not if you allready have found a solution but you can try this link:

https://docs.microsoft.com/en-us/Exchange/clients/outlook-on-the-web/mailbox-access?view=exchserver-...