Recently I had to upgrade from vCenter 6.0 U2 to 6.0 U2a because of this WebClient Bug (KB 2144934) But there are many stumbling blocks I would like to inform you about! I cannot say it enough, backup AND snapshot your vCenter before! In this release there are so many stumbling blocks where the upgrade could fail! Here are some examples: After some upgrade intentions the “VMware Workflow Manager” Service did not start anymore. Look at the “workflow-manager.log” In the log you can … Continue reading Read this before upgrade to vCenter 6.0 U2a (Windows)