Where can I find duty exchanges / absence requests?

In the main menu, Under your name, click on Requests. 

A page will load a full list of requests.

This way the user can keep better control of all the schedule requests happening for them in one screen. It is easy to filter and identify each type of schedule request. 

There are other fields to filter by start and end time, availability code (if any), rota/station or even status.

At the end of the request's row, users have the option to either go to the request or by clicking the arrow, they can select the "Show rota" option which will load the group rota for the specific time this request happened.