In some cases, you’ll see the following error message when performing changes with EasyEntra:
When you install Exchange on-premises, the Active Directory schema is extended with multiple Exchange-specific attributes. Some of these attributes are vital to mailbox management of linked accounts (Office 365 accounts synchronized from your local AD).
If you want to use EasyEntra to manage hybrid users with Microsoft 365 mailboxes and licenses as an integral part of your AD user management, your local AD must be updated with the Exchange schema extension (Exchange 2010 SP1 or later).
You don’t need an Exchange on-premises server installation, only the Active Directory schema update.
To confirm if the Exchange schema extension is missing from your domain, run the script in this article. If the Exchange schema version is less than 14726, you must update your schema with the Exchange schema extension.
How to Fix This Error
To update the Active Directory schema with the Exchange schema extension, download Exchange and run the schema extension.
We recommend installing the Exchange 2019 CU12 schema update if you’ve never installed Exchange.
Download Exchange 2019 CU15 here.
Mount the iso file and run the following command from the mounted drive:
Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataOFF /PrepareSchema
Ensure your system has the .Net Framework 4.8 installed and your account is a member of Enterprise Admins and Schema Admins.
If you’re currently running Exchange 2007 or 2010, we recommend installing the Exchange 2013 CU23 schema update.
Download Exchange 2013 CU23 here.
Run the downloaded setup.exe file to extract the installation binaries. Then run the extracted setup.exe using the following parameters:
Setup.exe /PrepareSchema /IAcceptExchangeServerLicenseTerms
For more information on extending the Active Directory schema with the Exchange schema extension, refer to Microsoft’s official documentation.
After extending your AD schema, you must reload the schema in Microsoft Entra Connect.
Open Microsoft Entra Connect, click Configure, and select Refresh directory schema:
Once the directory schema refresh has been completed, you can continue working in EasyEntra.
