I can confirm this error.
Precondition:

• Jenkins is connected to a vCenter instance
• Two templates (or VMs) available on the vCenter instance

Steps:

• Add a vSphere cloud
• Verify the connection by clicking "Test Connection" --> "Success"
• Register first VM by adding Template A name, and verify by "Check Template" --> "Success"
• Register a second Template A (or Template B) by adding anoter "Add vSphere Template"
• Verify by "Check Template"
  • --> Leads to error attached in text file: "Problem validating org.jenkinsci.plugins.vsphere.tools.VSphereException: com.vmware.vim25.InvalidLogin: Cannot complete login due to an incorrect user name or password."

Expected:

• Should lead to "Success"

Attached:
ErrorSTackTrace_SecondvSPhereTemplate.txt

We found a workaround, and probably the cause of the bug:

You have to go the template settings of your last added template (one above the one you see the validation exception), and change the "Launch Method" to "...via SSH". Then a credential window appears. Make sure to change to the credentials, which actually have access to your vcenter instance (in the screenshot: "jenkins_control").
Then press "Check Template" and it should work.

Hi Michael,

the workaround you provided didn't worked for me. I changed the Launch Method the SSH and select the credentials which i already select for the Vsphere host, instead the one i have to use really for SSH connection. But i get the same error before.

Hi Jan,
did you press apply after changing to the vsphere user? Maybe the change was not persisted.
After checking the template connection successfully you can change back to JNLP or whatever you had as a setting, and go on.

Hi,

yes saved the settings, but same results. Currently i worked around this bug with a second Cloud Instance.

I now deleted also my second Cloud Instance and configured a second template to my first Cloud instance, but same result, i cannot get the workaround working. Any idea what is different between our two setups?

Are you sure you set the first section in the config dialog also right?

------
General config
vSphere Cloud
Name of this Cloud Help for feature: Name of this Cloud
vSphere Host Help for feature: vSphere Host
Credentials: user which can control vsphere

Template 1
set the agent credetnail temporarly to vpshere user (as described )
—
Template 2

Are your vsphere user credentials really working? e.g. Template 1 check is successful?