126.96.36.199.11 Verifying the Tree Connect
The server MUST look up the TreeConnect in Session.TreeConnectTable by using the TreeId in the SMB2 header of the request. If no tree connect is found, the request MUST be failed with STATUS_NETWORK_NAME_DELETED.
If Connection.Dialect belongs to the SMB 3.x dialect family, the server MUST fail the request with STATUS_ACCESS_DENIED in the following cases:
If the server supports the 3.1.1 dialect, TreeConnect.Share.EncryptData is TRUE, Connection.ServerCapabilities includes SMB2_GLOBAL_CAP_ENCRYPTION, and Request.IsEncrypted is FALSE.
Otherwise, if the server supports the 3.0 or 3.0.2 dialect, EncryptData or TreeConnect.Share.EncryptData is TRUE, Connection.ServerCapabilities includes SMB2_GLOBAL_CAP_ENCRYPTION, RejectUnencryptedAccess is TRUE, and Request.IsEncrypted is FALSE.
EncryptData or TreeConnect.Share.EncryptData or Request.IsEncrypted is TRUE, RejectUnencryptedAccess is TRUE, and Connection.ServerCapabilities does not include SMB2_GLOBAL_CAP_ENCRYPTION.