Unfortunately, there is no logout functionality for App Portal. By default, sessions will time out after 20 minutes of inactivity and will require reauthentication to complete certain tasks (like checkout). If you are using Windows authentication and logged in from a domain-joined machine, that reauthentication will happen automatically. Likewise, if you are using SSO authentication and you are already authenticated to your identity provider, that reauthentication will happen automatically. Other scenarios will prompt for authentication.
If logout functionality is absolutely essential, I would suggest you submit an Idea requesting it. I know I have heard this question come up before, so it is likely other customers would vote for it.
Anything expressed here is my own view and not necessarily that of my employer, Flexera. If my reply answers a question you have raised, please click "ACCEPT AS SOLUTION".
