Retention Policy Service log displays an 'Access to the path XXXXX is denied' message. (4237283)

Retention Policy Service log displays an 'Access to the path XXXXX is denied' message.

Retention Policy Manager was running and purging emails successfully, but the RPS log had a few of the following error message example:

ERROR AfterMail.Log.Retention.Service - {{022e11b5-f6e3-4c53-b534-73aaafd54c4b}} Failed to delete message (0)
System.UnauthorizedAccessException: Access to the path '\\xx-xx-xxx\ArchiveManagerAttachment02\000\000\007\552\7552121.jpg' is denied.

Some data files were stored on a SAN within a shared folder that was attached to the Archive Manager Server with Windows 2008 R2 installed as