DCOM event ID 10016 is logged in Windows
These 10016 events are recorded when Microsoft components tries to access DCOM components without the required permissions. In this case, this is expected and by design.
A coding pattern has been implemented where the code first tries to access the DCOM components with one set of parameters. If the first attempt is unsuccessful, it tries again with another set of parameters. The reason why it does not skip the first attempt is because there are scenarios where it can succeed. In those scenarios, that is preferable.
These events can be safely ignored because they do not adversely affect functionality and are by design. This is the recommend action for these events.
Please reference the article at this link.