Changing the licensing mode

one of my colleagues made the installation oft he RD Licenseserver with phone registration but in ours case we had to use normal mode. So we can enter the amount of licenses manually.<o:p></o:p>

We have to do that because we had a campus aggreement. <o:p></o:p>

Is that possible and without interruption of user connections ?<o:p></o:p>

Thanks Sven<o:p></o:p>