The error message you are getting: 'Could not load file or assembly 'office, Version=, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. Access is denied.' tells us that your user account does not have the correct intended permissions to view and read a Microsoft Office file that is needed to use our add-in.

Please pass the following details to your IT department as you will need administrative rights to ensure you have the correct permissions:


  1. takeown /F C:\Windows\assembly\GAC_MSIL\office\\OFFICE.dll
  2. icacls C:\Windows\assembly\GAC_MSIL\office\\OFFICE.dll /q /c /t /grant Users:F
  3. takeown /F C:\Windows\assembly\GAC_MSIL\Microsoft.Office.Interop.Outlook\\Microsoft.Office.Interop.Outlook.dll
  4. icacls C:\Windows\assembly\GAC_MSIL\Microsoft.Office.Interop.Outlook\\Microsoft.Office.Interop.Outlook.dll /q /c /t /grant Users:F

Once the correct permissions have been granted, please open Outlook and enable the Egress Switch Outlook Add-in:

  1. Click ‘File’ from the Outlook toolbar and select ‘Options’.
  2. Select ‘Add-ins’ and you will see a list of active, inactive and disabled add-ins.
  3. If the Switch Add-in appears in the disabled list, select the drop down menu at the bottom of the screen and select ‘Disabled Add-ins’ and then click ‘Go’.
  4. Select the Switch Add-in and click ‘Enable'. Then click ‘Close’.
  5. Click the drop down menu and select ‘COM Add-ins’ and then click ‘Go’.
  6. Ensure that ‘Egress Switch’ is ticked and click ‘OK’ (A restart of Outlook may be required).




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