Dear friends,

in my company I have setup Microsoft Exchange server 2013 with windows 8.1 but now we have expand our network with another company so I want to send and receive emails from but of servers, now how to do in Microsoft exchange server 2013? if u have any information it will help me a lot thanks in advance.

Hi Shuja,

Thank you for your question.

We could create accept domain for two organization, we could refer to the following link:

https://technet.microsoft.com/en-us/library/bb124423(v=exchg.150).aspx

Then, we could create a send connector and MX record for another company. We could refer to the following link:

https://technet.microsoft.com/en-us/library/jj945053(v=exchg.150).aspx

in addition, we could deploy cross forest Exchange by the following link:

https://technet.microsoft.com/en-us/library/aa998597(v=exchg.150).aspx 

If there are any questions regarding this issue, please be free to let me know. 

Best Regard,

Jim