Question about SfB Licenses

[Renke]

Hello to the board !

This request isn't specific for the T48G, but as we intend to use them in the future, it's hopefully O.K. to post it here.

Our distributor sells Yealink phones ready for Lync/SfB.
Will they come with seperate license, I have to enter on each phone
or will they be ready configured completely with license ?

If the latter is the case:
do I have the option to view/backup the license before I flash the phone with the standard SIP firmware ?
It's because I need the Lync/SfB functionality but also would like to do some testing with standard SIP without voiding the license

Best Regards