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SharePoint Server 2013 Domain and Forest Functional Level Compatibility
Question details
Assess the compatibility and potential risks of upgrading domain controllers and raising Active Directory functional levels in an existing SharePoint 2013 farm.
- Product
- SharePoint Server 2013, SQL Server, Active Directory
- Device & OS
- Windows Server 2003
- Scenario
- Raising the domain and forest functional levels of Active Directory while maintaining the current domain name and identity setup.
- Observed behavior
- Seeking confirmation that SharePoint and SQL Server will continue to function seamlessly after the Active Directory infrastructure is upgraded.
Ensure you have comprehensive, verified backups of your Active Directory, SQL Server databases, and SharePoint farm before making any infrastructure changes.
Verifying Compatibility and Executing the AD Upgrade
Understand the distinction between raising functional levels and migrating domains to safely upgrade your environment.
Raising domain and forest functional levels is fundamentally different from migrating a SharePoint farm to a new domain. If your domain name and identity configurations remain strictly unchanged, your existing software infrastructure should generally continue to function.
However, because SharePoint 2013, SQL Server on Windows Server 2003, and older domain controllers are officially out of support, any unexpected issues will require independent troubleshooting without Microsoft assistance.
Set up an isolated lab environment that mirrors your current Active Directory, SQL Server, and SharePoint 2013 production configuration.
Perform the domain controller upgrades and raise the domain/forest functional levels within the test lab.
Log into the test SharePoint farm and verify that user authentication, site access, and SQL database connections are working normally.
Once compatibility is confirmed in the lab and full system backups are secured, proceed with raising the functional levels in your live environment.
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Frequently Asked Questions
Does raising the domain functional level require migrating the SharePoint farm?
No. Raising the functional level is an in-place upgrade for Active Directory features. Migrating a SharePoint farm to a new domain is a separate, much more complex process involving identity and URL changes.
Will my SQL Server on Windows Server 2003 stop working after the functional level upgrade?
Assuming the domain name and identities remain the same, SQL Server should continue to function. However, because Windows Server 2003 is unsupported, thorough testing in a lab environment is strongly recommended.
What should I do if user authentication fails in SharePoint after the upgrade?
Immediately verify your Active Directory replication status and check the SharePoint ULS logs. Because SharePoint 2013 is out of support, you must rely on your pre-upgrade backups to restore functionality if the issue cannot be resolved.
