I am trying to retrive the userid that signed on the dashboard. Tried several methods such as GETUSER(),CNTCNUSR()...all are returning IADMIN which is the reporting server userid. If I try to use IBIMR_user in the FEX, it prompts for that.

How to retrive the userid that signed into the dashboard inside the FEX. Should that be passed from html? If so how?

These are the variables you can set

<set> IBIMR_user(pass)
<set> IBIMR_domain(pass)
<set> MR_FULL_FEXNAME(pass)
<set> MR_ITEM_HANDLE(pass)

by editing the site.wfs

You can do this is your WebFocus Admin Console.

http://hostname:port]/ibi_apps/welcome.jsp

See the WebFOCUS Security&Administration manual, page 143