Exchange 2010 SP3 RU16 update fails with error code 2771

Exchange 2010 SP3 RU16 update fails with following error. Log Name: Application Source: MsiInstaller Date: ******* Event ID: 10005 Task Category: None Level: Error Keywords: Classic User: ******* Computer: ******* Description: Product: Microsoft Exchange Server — The installer encountered an unexpected error while installing this package. This may indicate a problem with this package. The error code is 2771….

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