Active Directory & Exchange Schema Versions

Schema Version

The Schema Versions option will display the current schema, domain, and forest level for a number of updates completed in the domain. This option can be used to support two scenarios, firstly to confirm the AD, Exchange, OCS schema version and functional levels, and secondly, to confirm a schema update has replicated to all the domain controllers in the forest by using the Include attribute and class counts option.  With the Include attribute and class counts options selected, the  total number of attributes and classes in the schema are returned.  When the scan is run with the Decode Value option deselected, only the values are returned.

These are the column definitions:

FFL - Forest Functional Level
DFL - Domain Functional Level
DCFL - Domain Controller Functional Level
Forest - Forest Update level
Domain - Domain Update level
RODC - The Read-Only Domain Controller update level
Schema - Active Directory schema version 
Exch Sch - Exchange schema version
Exch Forest - Exchange forest update level
Exch Dom - Exchange domain update level
OCS - Office Communication Server\Lync schema version
User Attributes - The number of attributes in the User class
Group Attributes - The number of attributes in the group class
Computer Attributes - The number of attributes in the computer class
Attributes - The number of attributes in the schema
Classes - The number of classes in the schema

The tables below show the schema update for the corresponding values stored in the AD.

    Domain & Forest Functional Level

NUMBER FUNCTIONAL LEVEL
02000
12003 Mixed
22003
32008
42008R2
52012
62012R2
72016
102025

Active Directory Schema Versions

Schema Version Product
132000
302003
312003R2
442008
472008R2
562012
692012R2
822016 TP3
852016 TP4
872016 RTM
882019
902025 TP
912025

OCS/Lync Schema Version

SCHEMA VERSION PRODUCT
10062005
10072007R1
10082007R2
11002010
11502012

Exchange Schema, Forest, and Domain Versions

Forest Schema
DN: CN=ms-Exch-Schema-Version-Pt,CN=Schema,DC=<domain>
Attribute: rangeUpper

Forest Version
DN: CN=Microsoft Exchange,CN=Services,CN=Configuration,dc=<domain>
Attribute: objectVersion

Domain Version
DN: CN=Microsoft Exchange System Objects,DC=<domain>
Attribute: objectVersion

Exchange Forest Schema Forest Version Domain Version
2019 CU14170031676213243
2019 CU13170031676113243
2019 CU12170031676013243
2019 CU11170031675913242
2019 CU10170031675813241
2019 CU9170021675713240
2019 CU8170021675613239
2019 CU7170011675513238
2019 CU2170011675413237
2019 CU1170001675213236
2019 RTM170001675113236
2016 CU23153341622313243
2016 CU22153341622213242
2016 CU21153331622113241
2016 CU20153331622013240
2016 CU18153331621913238
2016 CU18153321621813238
2016 CU13153321621713237
2016 CU12153321621513236
2016 CU11153321621413236
2016 CU7-CU10153321621313236
2016 CU6153301621313236
2016 CU4-CU5153261621313236
2016 CU3153261621213236
2016 CU2153251621213236
2016 CU1153231621113236
2016 RTM153171621013236
2016 Preview153171604113236
2013 CU23153121613313237
2013 CU22153121613113236
2013 CU10-CU21153121613013236
2013 CU7-CU9153121596513236
2013 CU6153031596513236
2013 CU5153001587013236
2013 SP1152921584413236
2013 CU3152831576313236
2013 CU2152811568813236
2013 CU1152541561413236
2013 RTM151371544913236
2010 SP3147341432213040
2010 SP2147321424713040
2010 SP1147261321413040
2010 RTM146221264012639
2007 SP3146251122211221
2007 SP2146221122211221
2007 SP1111161122111221
2007 RTM106371066610628
2003 SP2687069036936
2003 RTM687069036936
2000 SP344064406
2000 RTM43974406

Also check out Michel de Rooij website which may have more up to date information on Exchange versions. https://eightwone.com/references/schema-versions/

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