How do I change my DBO login?
It is not possible to change the related login name of the user "dbo" in the user's properties dialog. And it is also not possible to change or remove the dbo relation in the login name's properties dialog (because a dbo user can not be removed).
What is DBO user in SQL Server?
The dbo User is a built-in database user in every single database that represents the Database Owner. This user has full unrestricted access to the database. While you cannot login to a server as "dbo", you can login with a login that is mapped to the dbo user in one or more databases.
How do I change my DBO to SA?
You can not alter or drop DBO DBUser or SA login from an insance. In Database Properties dialog, select Files page, change the owner to sa and click OK. You should find in Properties dialog for dbo that login name has changed. Hope this is what you want.
How do I change DBO owner?
Go to SQL Server Management Studio >> Right Click on the Database >> Go to Properties >> Go to Files and select OWNER.