Performance Optimizations - optimizations for small random read/write I/O.Directory Leasing - Improves application response times in branch offices through caching.Encryption - Provides end-to-end encryption and protects from eavesdropping on untrustworthy networks.SMB Direct - adds RDMA networking support for high performance, with low latency and low CPU use.Multichannel - aggregation of network bandwidth and fault tolerance if multiple paths are available between client and server.Scale Out - concurrent access to shared data on all file cluster nodes.Transparent Failover - clients reconnect without interruption to cluster nodes during maintenance or failover.In Windows 10, Windows 8.1, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, and Windows Server 2012, disabling SMBv3 deactivates the following functionality: For more information, see How to detect status, enable, and disable SMB protocols on the SMB Server. We recommend keeping SMBv2 and SMBv3 enabled, but you might find it useful to disable one temporarily for troubleshooting. Disabling SMBv2 or SMBv3 for troubleshooting For a list of third parties that require SMB 1.0 and their updates that remove the requirement, review the SMB1 Product Clearinghouse. We recommend that instead of reinstalling SMB 1.0, you update the SMB server that still requires it. SMB 1.0 also isn't installed by default in Windows 10, except Home and Pro editions. SMB 1.0 isn't installed by default in any edition of Windows 11 or Windows Server 2019 and later.
While disabling or removing SMBv1 might cause some compatibility issues with old computers or software, SMBv1 has significant security vulnerabilities, and we strongly encourage you not to use it. This article describes how to enable and disable Server Message Block (SMB) version 1 (SMBv1), SMB version 2 (SMBv2), and SMB version 3 (SMBv3) on the SMB client and server components. Applies to: Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows 11, Windows 10, Windows 8.1, Windows 8
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