Well that was fast... 5 days after the release of VCSA 6.5.0c, comes 6.5.0d for both Windows & Photon OS versions of vCenter.Primary reason is bug fix support for VSAN 6.6 that was just released.What's NewThe vCenter Server 6.5.0d release includes new features and bug fixes related to vSAN 6.6. For more information, see the vSAN 6.6 Release Notes and the vSAN 6.6 documentation.The new build is: Name: VMware-VCSA-all-6.5.0-5318154.iso Release Date: 2017-04-18Build Number: 5318154The new patch is:VMware-vCenter-Server-Appliance-6.5.0.5500-5318154-patch-FP.isoDownload Size:1626.4 MBThe simplest way to install the patch is to use the Update feature in the VAMI interface of the VCSA GUI.Login to https://<VCSA-IP-or_FQDN>:5480Click on Update on the left.You can use the Settings button to setup Automatic Checking for Updates to VCSA.You can manually check for updates by clicking the Check Updates button.Once an update is displayed as in the following picture, you can install it.See also: http://blog.vmtraining.net/2017/04/vcsa-650c-is-out.html