This article will show you how to check your Exchange 2010 or 2007 Active Directory Schema version before or after you install Exchange Server 2010 or 2007.
To checks the Schema version open the command prompt and type:
dsquery * CN=ms-Exch-Schema-Version-Pt,cn=schema,cn=configuration,dc=DOMAIN,dc=LOCAL -scope base -attr rangeUpper
Confirm what the RangeUpper is and check the table below:
| Exchange Version | Forest rangeUpper attribute of ms-Exch-Schema-Version-Pt |
| Exchange 2000 RTM | 4397 |
| Exchange 2000 SP3 | 4406 |
| Exchange 2003 RTM | 6870 |
| Exchange 2003 SP1 | 6870 |
| Exchange 2003 SP2 | 6870 |
| Exchange 2007 RTM | 10637 |
| Exchange 2007 SP1 | 11116 |
| Exchange 2007 SP2 | 14622 |
| Exchange 2007 SP3 | 14625 |
| Exchange 2010 RTM | 14622 |
| Exchange 2010 SP1 | 14726 |
| Exchange 2010 SP2 | 14732 |