<div>
Dear All,<br />
<br />
I have to create new DAG computer in AD but I still get the same message error.<br />
do you have another solution?<br />
<br />
Best Regards,<br />
Kimhong
</div>


Dear All,

I have to create new DAG computer in AD but I still get the same message error.
do you have another solution?

Best Regards,
Kimhong

<div>
Enough information to confirm answer
</div>


<div>
<div class="content wysiwyg-content">
Dear All,<br />
<br />
A few weeks ago i have remove one node (EX5) from my DAG manually. After complete the window and exchange installation, i try to add the new node (EX3) back to DAG but i go the error message as below.<br />
&quot;The fully qualified domain name for node 'EX5' could not be found.&quot;<br />
<br />
Note: I have three nodes before EX1,EX2 and EX5 and now i remove EX5 and the new server is EX3.
</div>
</div>


Dear All,

A few weeks ago i have remove one node (EX5) from my DAG manually. After complete the window and exchange installation, i try to add the new node (EX3) back to DAG but i go the error message as below.
"The fully qualified domain name for node 'EX5' could not be found."

Note: I have three nodes before EX1,EX2 and EX5 and now i remove EX5 and the new server is EX3.

Cannot add new node to Existing DAG exchange 2016

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.