Windows 10: OWA and Outlook client unable to connect to On-Prem Exchange server from outside network.

We have this 3rd-party cloud email security provider for our exchange on-prem server. I asked them about why we still receive unwanted emails since it should block by their email protection service. They advise me to make sure that I should only allow their IP Address for incoming SMTP traffic in our firewall.In FW appliance, I changed the source IP from "all" to vendors IP address only for incoming SMTP traffic. Only port HTTPS and SMTP 25 is open. Although I can receive and send email inside our network, OWA and outlook client outside network is unable to connect to the server. Is there anyt

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Outlook not connected in Microsoft Exchange Server

Can the station see the server Exchange is running on? By Ping, direct access (\\server), or other means? It also may have Outlook Web Access running, https://server/OWA

 

Outlook not connected in Microsoft Exchange Server

I am new to Exchange Server 2003 and I have a friend with a network server that I don't know how to re-establish a user to the network. I moved one of his non used computers to this station and now when I try to log in the user I get the error that the name can't be verified because Outlook is not connected or online. This computer used to be online with a different user. Can anyone tell me the steps to check this? Thanks.

 

Can Cortana be directed to access my contacts on outlook exchange server?

Hello Yeoto,

Cortana can access your contacts which are in the People app. What we can do is to get those contacts from Exchange server exported, then import it to the People web app. To do so, follow the steps below:

• Export your Global Address List from your Outlook Exchange Server.
• Log in to Outlook People using the Microsoft account connected to your device.
  
• Import the .csv file to Outlook People by clicking Manage > Import Contacts.
  

Use Cortana and check if you can now access contacts from Outlook Exchange Server.

Let us know how it goes.