PurposeThis article provides steps to add, assign, remove, unassigned, and change the licenses of ESXi 5.x, vSOM 5.5 (vSphere with Operation Management Suite), vCloud Suite 5.x and vCenter Server 5.x. Notes:The vSphere 5.5 does not need new license keys. The existing 5.0 5.1 licenses will work and enable all the features of the software once upgradedTo determine if you need a new license key for the latest version of VMware product you own, see License key requirements for new version of VMware products (2059926)All ESXi 5.x and vCenter Server 5.x keys work with ESXi 5.15.5 and vCenter Server 5.15.5. To update your software from 5.0 to 5.1 5.5, see Installing or upgrading to ESXi 5.1 best practices (2032756) and Upgrading to vCenter Server 5.1 best practices (2021193). For information on upgrading license keys, see How to upgrade license keys in My VMware (2006974)The ESXi 5.15.5 features are automatically enabled after you upgrade from ESXi 5.0 to 5.15.5. This does not need a new license keyYou can view and manage your license keys in My VMware. For information on viewing your license keys, and for links to information on managing your license keys, see How to view license keys in My VMware (2006831)