Error: 0x4005, (16389)

Error: 0x4005, (16389)

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Symptoms:

While using Outlook 2010 the following error window appears:

 

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Mail Manager

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Error: 0x4005, (16389)

Function: MAPIInitialize

Context: Arup::DmLib::OasysMapi::CPostOffice::initialise

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OK  

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Cause:

Uninstalling a newer version of Outlook.

When this is the case, delete the following registry key of the newer version that was uninstalled:

 

Outlook 2013: [HKEY_CLASSES_ROOT\TypeLib\{00062FFF-0000-0000-C000-000000000046}\9.5]

Outlook 2016: [HKEY_CLASSES_ROOT\TypeLib\{00062FFF-0000-0000-C000-000000000046}\9.6]

 

Resolution:

Exit Outlook and via the Windows Task Manager and ensure that Outlook.exe and MailManager... .exe's are not running.
Ensure that the application that created the key above has been uninstalled, if not delete the registry key manually.
Repair the installation of Outlook 2010.
Restart Outlook 2010