In order to better understand why you are unable to change the Active Directory user account attributes, we suggest taking the following steps:

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1. Determine Domain and Domain Controller: Ensure that you are working on the correct domain and that the domain is located in the correct domain controller.
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2. Confirm Permissions: Confirm you have the necessary permission to make any changes to the user accounts.
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3. Verify Active Directory Services: Validate the status of the Active Directory services on your server.
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4. Check Settings: Verify that the settings associated with the Active Directory Installation (for example – Group Policy) are configured correctly.
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5. Troubleshoot: Utilize any available logging, monitoring, and troubleshooting resources to validate all operations related to the Active Directory user account.