No connection to Exchange Server when using ndOffice to save Emails

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Updated:

  • OS: Windows
  • Browser: N/A
  • Office: All
  • Product: ndOffice 2.1.20 and prior

Problem:

ndOffice may display a message that there is No connection to Exchange Server when saving from Opened emails and you may see a greyed out filing pane in the main Outlook display stating no item is selected.

In the OutlookAddin.log the following error is displayed.

Unable to cast COM object of type 'Microsoft.Office.Interop.Outlook.ApplicationClass' to interface type 'Microsoft.Office.Interop.Outlook._Application'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{00063001-0000-0000-C000-000000000046}' failed due to the following error: Error loading type library/DLL. (Exception from HRESULT: 0x80029C4A (TYPE_E_CANTLOADLIBRARY)).

Cause: This issue is caused by a left over registry key if you have downgraded your version of Microsoft Office from either Office 2010 to Office 2007, or Office 2013 to Office 2010 or 2007.

This typically occurs if you buy a machine with a higher version installed originally and you need to uninstall and reinstall to the version your firm runs. 

Solution: This issue can be resolved by deleting an invalid registry key left over from the higher version of Office. Follow the steps below that pertain to your scenario:

 

If you downgraded from Office 2016 to 2013

Close all Office applications (Outlook, Word, Excel).
Click your Windows Start button, either click Run or go to the Search box on the Start Menu, and type regedit. The Windows registry editor opens.
Navigate to the following key: HKEY_CLASSES_ROOT\TypeLib\{00062FFF-0000-0000-C000-000000000046}\9.6
Delete the 9.6 key.
Close the registry editor.

Reopen Outlook and test.

If you downgraded from Office 2013 to Office 2010 or 2007

Close all Office applications (Outlook, Word, Excel).
Click your Windows Start button, either click Run or go to the Search box on the Start Menu, and type regedit. The Windows registry editor opens.
Navigate to the following key: HKEY_CLASSES_ROOT\TypeLib\{00062FFF-0000-0000-C000-000000000046}\9.5
Delete the 9.5 key.
Close the registry editor.


Reopen Outlook and test.

 

If you downgraded from Office 2010 to Office 2007

Close all Office applications (Outlook, Word, Excel).
Click your Windows® Start button, either click Run or go to the Search box on the Start Menu, and type regedit. The Windows registry editor opens.
Navigate to the following key: HKEY_CLASSES_ROOT\TypeLib\{00062FFF-0000-0000-C000-000000000046}\9.4
Delete the 9.4 key.
Close the registry editor.

Reopen Outlook and test.

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