I’m currently playing around with the new VMware VSA 5.1. I have installed it successfully on a standalone vCenter with local users. But on a different vCenter which is using an OpenLDAP as user base the VSA Manager fails to install with the error message “Login failed due to a Bad user or password”.
The reason for that is that the installer tries to log in to the vCenter using the vCentername and the current user (example: vcenter01\administrator). This fails as the vcenter01 is not the correct domain in the SSO. In my case there are just domains valid the standard System-Domain and my OpenLDAP domain. To resolve this you can start the VSA Manager installer using some command line options.
This will enable the option to enter the vCenter credentials.
With the correct credentials the installation should complete without any errors.