I renamed SQL instance

exec sp_dropserver 'oldname'
excec add_linkedserver 'newname'

Rebooted server

select @@servername shows new server, but, exec sp_helpserver shows old and instance names.

In the registry, i updated name under SQL server keys but it didn't change anything


As soon as i run sp_dropserver 'oldname', 'droplogins'

and run exec sp_helpserver

it shows only new name but if i run sp_helpserver again, old one appears too in second row

2 Answers 2


According to your post, you've used sp_addlinkedserver which is not the partner procedure for sp_dropserver. The correct partner is sp_addserver. Please note that depending on the setup, configuration, and feature use, changing the server name may cause unintended side effects.

  • sp_addserver is not supported, getting error and sugestion to use sp_addlinkedserver
    – overflowed
    Sep 22, 2023 at 14:25
  • How is addserver not supported? That's the proper way. Adding a linked server is incorrect. Sep 22, 2023 at 14:28
  • nakulvachhrajani.com/2012/05/28/…
    – overflowed
    Sep 22, 2023 at 14:29
  • 2
    I'd suggest you read the article, "Replace remote servers by using linked servers." this isn't a REMOTE server. Sep 22, 2023 at 14:33

Run the below query to update the server name in the sys.servers catalog:

USE master;

-- Update the server name in sys.servers
EXEC sp_configure 'show advanced options', 1;
EXEC sp_configure 'allow updates', 1;

UPDATE sys.servers SET data_source = 'newname' WHERE server_id = 0;

-- Turn off the ability to update system catalogs
EXEC sp_configure 'allow updates', 0;
EXEC sp_configure 'show advanced options', 0;
  • 1
    You should never update or attempt to update any system tables directly. Sep 22, 2023 at 14:22
  • ok, what is other solution to my problem ?
    – overflowed
    Sep 22, 2023 at 14:31
  • Ad hoc updates to system catalogs are not allowed error
    – overflowed
    Sep 22, 2023 at 14:32

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