How to Change the Azure AD Connect Synchronization Service Account
Question details
The organization needs to change the Azure AD Connect synchronization service account to apply separate multifactor authentication policies.
- Product
- Azure AD Connect
- Device & OS
- not provided
- Scenario
- The current setup uses a Global Administrator account for synchronization, which prevents the organization from effectively enforcing multifactor authentication (MFA) on the service identity without causing sync issues.
- Observed behavior
- Azure AD Connect sync relies on a Global Administrator account, creating a security conflict with MFA policies meant for standard administrative identities.
Ensure you have Microsoft Entra ID Global Administrator credentials and a scheduled maintenance window, as modifying service accounts will temporarily pause directory synchronization.
Transition to a Least-Privilege Sync Account via Microsoft Guidelines
Changing the synchronization account requires specific Microsoft Entra ID expertise to avoid breaking directory synchronization. It is best to follow official documentation and consult specialized Azure engineers.
Using a Global Administrator account for Azure AD Connect synchronization violates the principle of least privilege and interferes with strict MFA requirements.
To resolve this, you must provision a dedicated synchronization account with limited permissions and update your Azure AD Connect configuration to use it.
Log into the Microsoft Entra admin center and create a new cloud-only account dedicated solely to synchronization tasks, ensuring it is not assigned the Global Administrator role.
Configure your Conditional Access policies so that this specific synchronization service identity is excluded from policies requiring interactive multifactor authentication.
Relaunch the Azure AD Connect wizard on your synchronization server, select the option to change the service account, and enter the credentials for the newly created least-privilege account.
If you encounter configuration errors or synchronization stops, post your issue in the dedicated Azure Community Support forum for specialized engineering assistance.
Document Your IT Security Plans with WPS Office
While WPS Office cannot configure your Azure AD Connect services, it is the perfect lightweight, free alternative to Microsoft Office for documenting IT deployment plans, tracking server configurations, and managing project spreadsheets.
- 1. Download and install: Visit the official WPS website to download the free, lightweight installation package for your PC or Mac.
- 2. Draft configuration plans: Use WPS Writer to outline your Azure AD Connect transition steps and document the new least-privilege account details.
- 3. Save and share securely: Save your IT documentation in standard .docx or .pdf formats to easily share with your system administration team.
Frequently Asked Questions
Why shouldn't I use a Global Administrator account for Azure AD Connect?
Using a Global Administrator account for background synchronization tasks poses a significant security risk and violates the principle of least privilege. It also frequently interferes with automated multifactor authentication (MFA) policies.
Will changing the synchronization account cause downtime?
The process involves updating the Azure AD Connect configuration and restarting the sync service. While this causes a brief pause in backend directory synchronization, it typically does not cause direct downtime for end users.
Can I apply MFA to the new synchronization service account?
Generally, automated sync service accounts should be excluded from standard MFA policies that require interactive user prompts, which is why a dedicated non-admin account is heavily recommended over a Global Administrator.
What happens if the Azure AD Connect sync account password expires?
If the password for the sync service account expires, directory synchronization will fail completely. Following Microsoft best practices, the password for this dedicated cloud account should be set to never expire.
