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Applies to:
SQL Server 2025 (17.x) Preview
This article describes the breaking changes to features in the SQL Server Database Engine introduced with SQL Server 2025 (17.x) Preview. These changes can break applications, scripts, or functionalities that are based on earlier versions of SQL Server.
Linked servers
SQL Server 2025 (17.x) Preview includes changes to encryption that introduce a breaking change to linked servers. These changes can break applications, scripts, or functionalities that are based on earlier versions of SQL Server. You might encounter these issues when you upgrade.
In SQL Server 2025 (17.x) Preview:
- Linked servers to instances of SQL Server 2025 Preview must use the
Encrypt
parameter in the connection string - When you migrate from previous editions of SQL Server to SQL Server 2025 Preview with Microsoft OLE DB Driver 19, existing linked server configurations can fail
For information about how to connect securely to SQL Server 2025 (17.x) Preview instances, see TDS 8.0.
Replication
SQL Server 2025 (17.x) Preview includes changes to encryption that introduce a breaking change to Transactional, Snapshot, Peer to peer and Merge replication.
In SQL Server 2025 (17.x) Preview:
- In-place upgrades to SQL Server 2025 Preview for instances with a remote distributor can fail
- Adding a remote distributor to a SQL Server 2025 Preview publisher can fail
For information about how to connect securely to SQL Server 2025 (17.x) Preview instances, see TDS 8.0.
Log shipping
SQL Server 2025 (17.x) Preview includes changes to encryption that introduce a breaking change to log shipping. You might encounter these issues when you upgrade.
Log shipping monitoring can break if the monitor is a remote SQL Server 2025 (17.x) Preview instance when other SQL Server instances in the log shipping topology use a previous version.
For information about how to connect securely to SQL Server 2025 (17.x) Preview instances, see TDS 8.0.
PolyBase
SQL Server 2025 (17.x) Preview includes changes to encryption that introduce a breaking change to PolyBase. These changes might break applications, scripts, or functionalities that are based on earlier versions of SQL Server.
In SQL Server 2025 (17.x) Preview:
- PolyBase component fails to start on SQL Server 2025 Preview
- SQL Server 2025 Preview PolyBase connections fail when connecting to an external SQL Server data source