We have our own version of My Inbox integrated with Fiori Launchpad. Of course, this Launchpad mobile client is installed on the user' s mobile. Lets say, one user receives an notification email from back-end SAP system, which tells him or her there is workitem pending for his or her approval, once the user clicks the link in the email, My Inbox app should be launch on the mobile.
1) Is it possible?
2)How should the link be constructed?
You can launch any application using Intent-based navigation in Fiori Launchpad.
If you need to pass the parameters to the application, you can also achieve this by configuring them in Fiori Launchpad Designer.