Check Exchange Schema version with PowerShell

You want to know if your Active Directory (AD) is up to date. For example, you want to check and verify the Exchange 2013/2016/2019 schema version before and after an upgrade to the newer Exchange Server version. In this article, you will learn how to check the Exchange schema version with PowerShell.

Why check Exchange schema version information

It’s good to check and verify the Exchange schema version, for example:

• Before installing Exchange Cumulative Update
• Before installing a new Exchange Server
• After preparing Active Directory and domains for Exchange Server

Get Exchange schema version with Get-ADversions PowerShell script

Download the script Get-ADversions.ps1 and save it in the C:\scripts\ folder.

Ensure that the file is unblocked to prevent any errors when running the script. Read more in the article Not digitally signed error when running PowerShell script.

Another option is to copy and paste the below code into Notepad. Give it the name Get-ADversions.ps1 and place it in the C:\scripts folder.

# Exchange Schema Version
$sc = (Get-ADRootDSE).SchemaNamingContext
$ob = "CN=ms-Exch-Schema-Version-Pt," + $sc
Write-Output "RangeUpper: $((Get-ADObject $ob -pr rangeUpper).rangeUpper)"

# Exchange Object Version (domain)
$dc = (Get-ADRootDSE).DefaultNamingContext
$ob = "CN=Microsoft Exchange System Objects," + $dc
Write-Output "ObjectVersion (Default): $((Get-ADObject $ob -pr objectVersion).objectVersion)"

# Exchange Object Version (forest)
$cc = (Get-ADRootDSE).ConfigurationNamingContext
$fl = "(objectClass=msExchOrganizationContainer)"
Write-Output "ObjectVersion (Configuration): $((Get-ADObject -LDAPFilter $fl -SearchBase $cc -pr objectVersion).objectVersion)"

Run PowerShell as administrator. Make sure that you set the Execution Policy to Unrestricted. If you don’t, the script will not run.

Set-ExecutionPolicy Unrestricted -Force

Now run the Get-ADversions.ps1 PowerShell script.

C:\scripts\.\Get-ADversions.ps1

After running the PowerShell script, you will see an output of the Active Directory versions:

• RangeUpper: 17003
• ObjectVersion (Default): 13242
• ObjectVersion (Configuration): 16759

The next step is to check and verify the schema.

Check and verify Active Directory versions

How to confirm the Exchange Active Directory versions? Visit the page Exchange schema versions to get a list of the object versions.

We can confirm that Exchange 2019 schema version is up to date for Exchange 2019 CU11.

Conclusion

You learned how to check and verify the Exchange schema version with PowerShell. Run the Get-ADversions.ps1 PowerShell script and check if the Active Directory versions are correctly shown.

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