To use the product after the evaluation period has expired, you either have add a license key, or reinstall it.

If the 60 days were not sufficient to evaluate the product, you may contact a VMware representative and ask for an extended trial license key.

André

Great  thank   you Andre

Andre  i  just called  Vmware  but  they did not  want to give  me more days  they  were  asking me  to  buy the license : can you please let me know  how do you  reinstall it  and make work  thanks!!!!

In case you are evaluating the Windows based version, I'd suggest you do a complete reinstall of the OS (Windows) and then install vCenter Server. In case of the vCenter Server Appliance, simply deploy a new instance.

André