InstantForum.NET v2.9.0SQLServerCentralhttp://www.sqlservercentral.com/Forums/notifications@sqlservercentral.comTue, 21 May 2013 05:16:40 GMT20http://www.sqlservercentral.com/Forums/Topic407120-146-1.aspxTo begin mirroring select Start Mirroring and the mirroring process will begin. Make sure you have restored your backup on the mirror instance or this process will not work.If you need to make changes select Do Not Start Mirroring and make the adjustments or do the restore if you have not done so already. Thu, 12 Aug 2010 22:36:36 GMTSuvenduhttp://www.sqlservercentral.com/Forums/Topic407120-146-1.aspxHi!as per your error you have to check the service login id of both servers and connection userid and password of both servers. Becuase problem is only with these things.Thanks & regardsRajni Kant RanjanMon, 08 Oct 2007 04:53:31 GMTRajni Kant Ranjanhttp://www.sqlservercentral.com/Forums/Topic407120-146-1.aspxAgree with Chirag, you must have some connection string mis-configuration.Fri, 05 Oct 2007 09:23:19 GMTSteve Jones - SSC Editorhttp://www.sqlservercentral.com/Forums/Topic407120-146-1.aspxHiError message says "invalid connection string". Check the connection relate things , user accounts under which the 2 instances are running etc..Fri, 05 Oct 2007 05:21:01 GMTChiragNShttp://www.sqlservercentral.com/Forums/Topic407120-146-1.aspxHi Everyone,I setup database mirroring between two NAMED instances on two different servers. After completeing the database mirroring configuration, I clicked on Start Mirroring button then I got below error message. Both Named instances are running on other than default ports (1434) and mirror endpoints ports are 5022. An Error occurred while starting mirroringAlter failed for Database Test (Microsoft.SqlServer.Smo)An exception occured while executing a Transact-SQL statement or batch.Alter Database Command failed due to an invalid server connection string. (Microsoft SQL server, Error: 1449).For testing purpose, I installed two named instances on same test box and configured database mirroring and that is working fine. so it seems the problems with two instances on [b]DIFFERENT Servers[u][/u][/b].Any help is greatly appreciated.Thu, 04 Oct 2007 15:17:44 GMTBhushan Kalla