I get mails that my server's RDS CAL license grace period expires soon.
Do I need to purchase client access licenses? When I click on your link to the Microsoft page and click on "Purchase Client Access Licenses (http://go.microsoft.com/fwlink/?LinkId=81077)" I get no information about purchasing client access licenses.
I would like to have information about the costs of such licenses.
If you would like to continue using RDS on your server after the grace period, yes, you will need to purchase an appropriate number of RDS CALs and apply them before the grace period runs out. Your VM provider should be able to take care of license purchases. Cameyo.com/pricing has a fully hosted offering that includes RDS CALs. If you are hosting your own server yourself, your favorite software supplier should have purchasing information regarding the appropriate RDS CALs.