Hi Everyone,

I installed exchange 2013, already added an SRV for autodiscover on my external DNS, my problem is when I'm on a public network or on my house networt, which doesnt have any firewall (directly connected to the internet). I can connect my outlook to the Exchange server. When I'm @ the office (Internal Network) I'm having issues, we cannot connect to the Exchange Server. Is there any ports? or application control? that we need to allow on the internal security?

Thanks,

MIkey Cunanan

MSI-ECS

Do you LB for internal network ? if yes check you are able to telnet to LB on 443.

If not, are able to telnet to port 443 from internal network to direct exchange servers.

Enable netmon and launch outlook and see where the network is routing.

Hi Vishwanath,

can it be more specific?

LB = load balancer

Do you have load balancer for internal network.

You should be able to telnet from your Internal network to exchange servers / load balancer on 443.

Outlook uses rpc/https for both internal and external communication

Have you set your Exchange internal urs to load balancer urls ? 

Load balancer?

are you refering to firewall?

on direct connection @ home I can connect with no problem.

When connecting here in office with proxy, I cannot connect, even if we uncheck the firewall settings.

Problem solved..

1.Defined internal OA same as external OA

2. Disable IPV6 on Exchange Server

3. Authentication set to Basic

4. Restart pc

Problem solved..

1.Defined internal OA same as external OA

2. Disable IPV6 on Exchange Server

3. Authentication set to Basic

4. Restart Exchange Server

• Edited by mikeycunanan 23 hours 15 minutes ago