Organisations buying Visual Studio with MSDN through the MPSA will use a brand new portal to manage their MSDN subscriptions.
There’s a just-released Administrator’s Guide which has 24 pages of useful knowledge including admin for large teams and external contractors, how to add administrators to the portal, as well as all the day-to-day tasks of assigning subscriptions along with instructions for the Bulk Upload facilities.
Get the guide here: http://bit.ly/1fYNT2V but note that existing subscriptions are still managed through VLSC, so the VLSC Admin Guide is worth a look too: http://bit.ly/1ucJ3hm.