Microsoft SQL Server Agent proxy accounts define a security context in which a job step can run.
To create a proxy account
1.In Object Explorer, expand a server.
2.Expand SQL Server Agent.
3.Right-click Proxies and select New Proxy.
4.On the General page of the New Proxy Account dialog, specify the proxy name, credential name, and description for the new proxy. Note that you must create a credential first before you create a proxy if one is not already available. For more information about creating a credential, see How to: Create a Credential (SQL Server Management Studio) or CREATE CREDENTIAL (Transact-SQL).
5.Check the appropriate subsystem for this proxy.
6.On the Principals page, add or remove logins or roles to grant or remove access to the proxy account.
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