Click Edit feature settings on the Actions pane.Optionally, you can add other public IP address(es) that you want to allow access from.In the following example I've configured the 192.168.1.0/24 LAN network. Double-click IP Address and Domain Restrictions and click Add Allow Entry on the Actions pane and enter the range for your internal LAN.Open Internet Information Services (IIS) Manager and expand Default Web Site to the ECP virtual directory.Start by adding the IP Address and Domain Restrictions feature to the Web Server (IIS) role in Server Manager for each Exchange 2013/2016 hybrid server in the org.The third way is to limit access to only internal IP addresses using IIS, as shown below:
You'll need another internal server for administration. Note that the command above will disable EAC on all Exchange servers, both internally and externally.
Get-EcpVirtualDirectory | Set-EcpVirtualDirectory -AdminEnabled $false Disable external EAC access on all ECP virtual directories using the following cmdlet (thanks to for reminding me) :.Remove the OWA/ECP namespace from external DNS so external clients can't resolve the FQDN.But now that everyone in their organization has been migrated to Exchange Online, there's no need to allow external access to the hybrid servers for OWA or ECP. These customers have already completed all their mailbox migrations to Exchange Online and understand they'll need to keep that last Exchange server on-prem as a management server to manage mailboxes, groups, contacts, etc.
Servetome disable external access how to#
When I was at Microsoft Ignite last week, several customers asked me how to block external access to the Exchange Admin Center.
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