SQL Server - Agent Proxy Error

Question

Job History:

Message
Unable to start execution of step 1 (reason: Could not get proxy data for proxy_id = 4). The step failed.

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Agent Log:

[442] CryptUnprotectData failed (1325).

Server:

Microsoft SQL Server 2005 - 9.00.3080.00 (X64) Sep 6 2009 09:15:46 Copyright (c) 1988-2005 Microsoft Corporation Standard Edition (64-bit) on Windows NT 5.2 (Build 3790: Service Pack 2)
product_level - SP2
edition - Standard Edition (64-bit)

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I've done the setup following two different paths:

1. replication setup wizard manually,
2. specifically following these instructions:how-to-run-sql-server-agent-and-sql-server-jobs-with-least-privilege-in-sql-server-2005

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SQL Agent and SQL Server both run under Local System accounts which are members of the local group, administrators

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I don't see this kb article as applying: http://support.microsoft.com/kb/938086

• not a high # of calls
• error messages aren't even close

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The account being pointed to by the credentials is also an administrator on the box.

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SSIS Package not running under proxy is not the case.

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Of course, changing the job step to run under the sql agent account works fine.