Hi Navya,
Thanks - I wish I could say that I am able to get the WDA functionality error free 
I have followed the link you have provided at the initial phase of implementation
To be very precise - I have below queries (keeping concept of mapping two clients at the moment - atleast first standard functionality should work)).
# Once done with activating WDA business functions(obviously WDA relevant ones) and PFCG roles from backend to portal (WDA PFCG roles ends with WDA_3).Now what roles need to be assigned to user ? PFCG roles which we have uploaded to portal ? if yes I am getting a screen with overview page yes, No Launchpad customization reflects in ESS menu if I am trying to hide some services. -Do we need to assign any role to user in backend as well apart from standard ESS end user role.
#Second thing, after uploading WDA roles, if I am assigning portal roles provided by SAP, I am getting screen which I have shared with you in above post, screen with three tabs of map, directory and index - and If I am changing anything in Launchpad in backend, all are reflecting on portal but if I am clicking on any services like leave request, nothing is getting open - so here again, am I missing something like I need to assign role to user in backend.?
What I have understood so far, that atleast we are okay till uploading PFCG roles, thereafter we are doing something which is getting messed up..
So now, Hope I am clear where exactly I am stuck up -
Many thanks,
Regards