Troubleshooting host name changes in SQL Server

 When the machine name is changed where we have installed SQL Server, all the instances services are started but replication, Jobs, Alerts, Maintenance plans causes errors. Hence we have to rename the instance.

To rename instance we can use the following SP


1.      Check the old server name as follows

SELECT @@servername

2.      Drop the server and add the new server name

             SP_DROPSERVER   <oldName>

           SP_ADDSERVER <newName>, local

3.      Restart the instance

4.      Check the server name again

SELECT @@servername

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