link server error after switching from SQL authentication to Active directory service account

Hi All,

I am trying to switch from using a SQL account to use active directory service acccount selecting impersonate option on a link server. When i try do this i get below errror.

any ideas how to fix?

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TITLE: Microsoft SQL Server Management Studio
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The linked server has been updated but failed a connection test. Do you want to edit the linked server properties?

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ADDITIONAL INFORMATION:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)

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Access to the remote server is denied because no login-mapping exists. (Microsoft SQL Server, Error: 7416)

For help, click: https://docs.microsoft.com/sql/relational-databases/errors-events/mssqlserver-7416-database-engine-error

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