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While trying to install Exchange server 2013 CU23 in our test environment am receiving the following error - The Active Directory Schema version (170003) is higher than Setup's version (15312).
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Hi
it the scheme of your test environment has been already upgraded to higher version EXchange 2019.
Exchange 2013 is not supported version since 11 Avril 2023
for more information please read the following link:
https://eightwone.com/references/schema-versions/
Please don’t forget to accept helpful answer
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Hi Daniel Brown,
Please note that the Active Directory Schema version is updated each time you install a new version of Exchange and it cannot be reverted to an older version unless you restore the DC from a backup.
Please refer to this link for more information on preparing Active Directory and domains for Exchange Server. https://learn.microsoft.com/en-us/exchange/plan-and-deploy/prepare-ad-and-domains?view=exchserver-2019
Best Regards,
Ian Xue
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Hi @Thameur-BOURBITA Is there anyway of downgrading/removing this schema so that we can install Exchange Server 2013.
Unfortunately it's not possible because schema upgrade is irreversible. In this case , if you want install Exchange 2013 in test environment you can create new virtual machine and create new domain for that.
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