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Install second Exchange Server 2016 in domain

We have an existing Exchange organization with only one Exchange Server. For high availability, we like to install a second Exchange Server 2016 in the domain. The steps will work the same for other on-premises Exchange Server versions. In this article, you will learn how to add a second Exchange Server 2016 in domain.

Exchange Server prerequisites

Before you install Exchange Server, you need to have a Windows Server available. It’s because you will install Exchange Server on Windows Server. You can install Exchange Server 2016 on these Windows Servers:

  • Windows Server 2012
  • Windows Server 2012R2
  • Windows Server 2016 (Exchange Server 2016 CU3 or higher)

Read more in the article Install Exchange Server 2016 prerequisites.

Before you start to install second Exchange Server in domain

It’s good that after setting up the Exchange Server requirements on the Windows Server, to follow and configure these settings:

Find Exchange Server version

We recommend installing the same Exchange Server version as the one that is running in the organization. Start Exchange Management Shell as administrator. Run the Get-ExchangeServer cmdlet to check which Exchange Server version is running in the domain.

Exchange Server 2016 CU17 is running in the organization.

Install Exchange Server 2016

Download Exchange Server 2016 CU 17 ISO image. Open the ISO image and check to which drive letter it’s mapped. You don’t have to prepare Active Directory and domains for Exchange Server because it did already prepare when you installed the first Exchange Server.

Open Command Prompt as administrator. Run the command to install the Exchange Mailbox server role.

After Exchange Server setup finished. Restart the Exchange Server.

Read more in the article Install Exchange Server 2016 step by step.

Get Exchange autodiscover URL

After installing Exchange Server, we will get the Exchange autodiscover URL and set the Exchange autodiscover URL. Otherwise, the users will get a security alert certificate warning.

The users will see it as a security risk and will call the IT support desk. Save the support desk from these calls and immediately change the autodiscover URL after you install the second Exchange Server to the domain.

Install second Exchange Server 2016 in domain certificate warning autodiscover

Run Exchange Management Shell as administrator. Run the cmdlet to get the Autodiscover URL. We need to adjust the Exchange Server EX02-2016 AutoDiscoverServiceInternalUri to a generic namespace, just as EX01-2016 is already configured.

Read more in the article: Find autodiscover URL in Exchange with PowerShell.

Set Exchange autodiscover URL

Set the autodiscover URL and restart IIS to apply the changes. We have seen in the past that it’s better to restart the Exchange Server after we configure autodiscover URL to have the change take immediate effect.

Read more in the article: Configure autodiscover URL in Exchange with PowerShell.

After you set the autodiscover URL, you will not bother anyone in the organization with a certificate warning.

What’s next?

Configure the next steps on the second Exchange Server:

Conclusion

In this article, you learned how to install a second Exchange Server 2016 in the domain. It’s almost the same process as installing the first Exchange Server. The only difference is that you don’t have to prepare Active Directory and domains.

After you install a second Exchange Mailbox server, pay close attention, and change the autodiscover record. Otherwise, a certification security alert shows up in Outlook, and that will bother the users.

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ALI TAJRAN

ALI TAJRAN

ALI TAJRAN is a passionate IT Architect, IT Consultant, and Microsoft Certified Trainer. He started Information Technology at a very young age, and his goal is to teach and inspire others. Read more »

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