I have been searching on PartnerSource without any lock so far. I have asked Microsoft DK, but still gotten no reply.
But maybe someone here knows the answer.
Are you familiar with the rules regarding License Transition when it comes to changing from an owned BRL or MBL to a hosted SPLA license?
With the SPLA you pay per named user per month, but the SPLA license fee for one month will usually never be equal to the value of the existing license. And normally with the transition rules, then you cannot "save" any value, but you must use it all at once, otherwise it's "losts".
I finally got the answer!
Not exactly what I was looking for, as there is no transition program between normal MBL/BRL licenses into SPLA licenses.