Intermittently users are not able to log into Orchestrator. Users are able to enter credentials but then get a Windows.Scheme error.
StatusCode: 500,StatusDescription: "InternalServerError",Message: "No authentication handler is registered for the scheme 'Windows.Scheme'. The registered schemes are: idsrv, idsrv.external, windowsTempLogin, Identity.Application, Identity.External, Identity.TwoFactorRememberMe, Identity.TwoFactorUserId, Bearer, Windows. Did you forget to call AddAuthentication().AddSomeAuthHandler?"
2020-11-12 22:11:26.4551 UiPath.IdentityServer.Web.Middleware.ExceptionHandlingMiddleware An error has occurred.SqlException*Connection Timeout Expired. The timeout period elapsed while attempting to consume the pre-login handshake acknowledgement. This could be because the pre-login handshake failed or the server was unable to respond back in time. The duration spent while attempting to connect to this server was - [Pre-Login] initialization=21033; handshake=0; * at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) at Microsoft.Data.ProviderBase.DbConnectionPool.WaitForPendingOpen()
Need to configure MultiSubnetFailover=True in SQL connection string.