Active Directory and Exchange Schema Version

Active Directory (Forest Prep) Schema Versions:

How to find Active directory Schema

Using “ADSIEdit.msc” or/and “LDP.exe” tools:Navigate to:”CN=Schema,CN=Configuration,DC=domain,DC=local“and review the current “objectVersion” attribute.

Using “DSQuery” command line:”dsquery * cn=schema,cn=configuration,dc=domainname,dc=local -scope base -attr objectVersion“The following information provides a mapping between the “objectVersion” attribute value, to

Using PowerShell

================
ACTIVE DIRECTORY
================

using the Active Directory Cmdlets:

import-module ActiveDirectory
$ADForestConfigurationDN = ((Get-ADForest).PartitionsContainer) -Replace(‘CN=Partitions,’)
$ADSchemaInfo = Get-ADObject “cn=schema,$ADForestConfigurationDN” -properties objectversion
$ADSchemaVersion = $ADSchemaInfo.objectversion
Write-Output “The current AD Schema Version is $RootDSEADObjectVersion which is $ADSchemaVersionName `r ”
Write-Output ” `r “

Regedit

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\NTDS\Parameters

Exchange Schema Versions

What is Exchange Schema

Exchange Schema version or Exchange Active Directory versions , The tables in the following sections contain the Exchange objects in Active Directory that are updated each time you install a new version of Exchange (a new installation or a CU). There are three very important parameters of the Exchange Schema: rangeUpper, objectVersion (Default), objectVersion (Configuration).

• rangeUpper is located in the Schema naming context in the properties of the ms-Exch-Schema-Version-Pt container.
• objectVersion (Default) is the objectVersion attribute located in the Default naming context in the properties of the Microsoft Exchange System Objects container.
• objectVersion (Configuration) is the objectVersion attribute located in the Configuration naming context in Services > Microsoft Exchange in the properties of the <Your Exchange Organization Name> container.

Exchange 2016 Schema Active Directory versions (Forest Prep)

When you run prepare schema and PrepareAD

<Virtual DVD drive letter>:\Setup.exe /IAcceptExchangeServerLicenseTerms /PrepareSchema

Exchange 2019 Schema Active Directory versions (Forest Prep)

How to Find Forest rangeUpper and objectVersion

For the forest, you can find out the current schema version by consulting the rangeUpper property of CN=ms-Exch-Schema-Version-Pt,cn=schema,cn=configuration,. To read the forest version, consult the objectVersion property of cn=,cn=Microsoft Exchange,cn=Services,cn=Configuration,.

For example, to find out the current Exchange forest schema version and forest version, use a tool like ADSIEDIT or use PowerShell (replace ‘Contoso’ with the name of your Exchange organization):

ADSIEDIT

CMD-> adsiedit.msc->connect->Schema->configuration->cn=ms-Exch-Schema-Version-pt

Rangupper: 1533 for Exchange 2016 Cu20

objectVersion Default

The same action below but choose connect default

objectVersion configuration

The same action below but choose connect configuration

PowerShell

#Forest rangeUpper
#Forest objectVersion
$RootDSE= ([ADSI]"").distinguishedName
([ADSI]"LDAP://CN=ms-Exch-Schema-Version-Pt,CN=Schema,CN=Configuration,$RootDSE").rangeUpper
([ADSI]"LDAP://cn=viettechgroup,cn=Microsoft Exchange,cn=Services,cn=Configuration,$RootDSE").objectVersion
#//Domain
$RootDSE= ([ADSI]"").distinguishedName
([ADSI]"LDAP://CN=Microsoft Exchange System Objects,$RootDSE").objectVersion

or

PS C:\> # Exchange Schema Version
PS C:\> $sc = (Get-ADRootDSE).SchemaNamingContext
PS C:\> $ob = "CN=ms-Exch-Schema-Version-Pt," + $sc
PS C:\> Write-Output "RangeUpper: $((Get-ADObject $ob -pr rangeUpper).rangeUpper)"
RangeUpper: 15332
 
PS C:\># Exchange Object Version (domain)
PS C:\>$dc = (Get-ADRootDSE).DefaultNamingContext
PS C:\>$ob = "CN=Microsoft Exchange System Objects," + $dc
PS C:\>Write-Output "ObjectVersion (Default): $((Get-ADObject $ob -pr objectVersion).objectVersion)"
ObjectVersion (Default): 13237
 
PS C:\># Exchange Object Version (forest)
PS C:\>$cc = (Get-ADRootDSE).ConfigurationNamingContext
PS C:\>$fl = "(objectClass=msExchOrganizationContainer)"
PS C:\>Write-Output "ObjectVersion (Configuration): $((Get-ADObject -LDAPFilter $fl -SearchBase $cc -pr objectVersion).objectVersion)"
ObjectVersion (Configuration): 16217

Download Script here Get-ADversions.ps1 

Good luck for you to install and deploy Exchange Server 2016, 2019

Phuong Nguyen