Returns a Boolean (bool in C#) to indicate if an add-in or external caller is considered trusted by Outlook. Read-only
Assembly: Microsoft.Office.Interop.Outlook (in Microsoft.Office.Interop.Outlook.dll)
For out-of-process callers that have instantiated the Application object, IsTrusted always returns False. For Outlook add-ins, IsTrusted returns True if and only if the add-in is considered trusted by Outlook.