How to determine your AD and Exchange Schema version

How to tell what version of AD/Exchange you have.

To find the current Active Directory Schema Version, you can use one of the following methods:
  
Note: The internal root domain that we use in this demo is: “domain.com “.
  
1. Using “ADSIEdit.msc” or/and “LDP.exe” tools:
 
Navigate to: 
CN=Schema,CN=Configuration,DC=domain,DC=com”  
and review the current “objectVersion” attribute.

  2. Using “DSQuery” command line:
 “dsquery * cn=schema,cn=configuration,dc=domainname,dc=com -scope base -attr objectVersion

Example:
C:Documents and Settingsnocadmin>dsquery * cn=schema,cn=configuration,dc=KINETICSYSTEMS,dc=Local -scope base -attr objectversion
 Objectversion
  31
 Note: Here the Objectversion is 31 and domain name is KINETICSYSTEMS.Local
 
The following information provide a mapping between the “objectVersion” attribute value, to 
the Active Directory Schema commutability:

 13 -> Windows 2000 Server
30 -> Windows Server 2003 RTM, Windows 2003 With Service Pack 1, Windows 2003 With Service Pack 2
31 -> Windows Server 2003 R2
44 -> Windows Server 2008 RTM
47-> Windows Server 2008 R2
 
 To find the current Exchange Schema Version, you can use one of the following methods:
 
 Note: The internal root domain that we use in this demo is: “domain.com“.
  
1. Using “ADSIEdit.msc ” or/and “LDP.exe” tools:
 
Navigate to: 
CN=ms-Exch-Schema-Version-Pt,CN=Schema,CN=Configuration,DC=domain,DC=com” 
and review the current “rangeUpper” attribute.
   
2. Using “DSQuery” command line: 
dsquery * CN=ms-Exch-Schema-Version-Pt,cn=schema,cn=configuration,dc=domain,dc=com -scope base -attr   rangeUpper
 
 The following information provide a mapping between the “rangeUpper” attribute value, to 
the Exchange Schema commutability:

4397 -> Exchange Server 2000 RTM
4406 -> Exchange Server 2000 With Service Pack 3
6870 -> Exchange Server 2003 RTM
6936  -> Exchange Server 2003 With Service Pack 3
10628 -> Exchange Server 2007
11116 -> Exchange 2007 With Service Pack 1
14622->  Exchange 2007 With Service Pack 2

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