A default deployment of the Egress add-in keeps it possible for users to disable the Egress add-in in Outlook or other Office applications manually. 

Administrators can override this setting by enabling the relevant group policy setting. This will prevent users from manually disabling the add-in.

Steps:

  1. Open the Group Policy Editor and check that the Office Administrative Templates are installed. These can be located in User Configuration > Administrative Templates > Microsoft Outlook [YEAR] > Miscellaneous.

    If they are not installed, the administrative templates for Microsoft are available at the below URLs:

    Office 2016: https://www.microsoft.com/en-us/download/details.aspx?id=49030
    Office 2013: https://www.microsoft.com/en-gb/download/details.aspx?Id=35554
    Office 2010: https://www.microsoft.com/en-gb/download/details.aspx?id=18968

  2. Ensure that 'List of managed add-ins' setting is set to 'Enabled'.

  3. Select Show... in the 'List of managed add-ins'.

  4. Write Egress.Switch and set the value to 1. This will ensure the add-in cannot be disabled.

  5. Alternatively, it's possible to deploy the registry key out via GPO. The Registry Key type should be REG_SZ.



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