Lab Manager API deployment issue

Spent the last few days troubleshooting an issue, initially, we thought it might be a fenced vs. unfenced configuration conflict, but when users try to deploy Lab Manager environments from the API tool we wrote in house, the following error was generated:

=========================================

Unable to deploy virtual machines in resource pool "LBM4".

• DRS failed to find hosts to deploy the virtual machines on the resource pool "resgroup-32975".
• DRS failed to find host for virtual machine "049104-DC". vCenter reported: This operation would violate a virtual machine affinity/anti-affinity rule.
• Unable to find host for virtual machine "RuleViolation".
• DRS failed to find host for virtual machine "049105-VCM". vCenter reported: This operation would violate a virtual machine affinity/anti-affinity rule.
• Unable to find host for virtual machine "RuleViolation".
• etc…..

=========================================

Since verything worked great from the Lab Manager UI, we knew it must be an API issue, it turns out the answer was that the old script from the Lab Manager 3 days was using the “Do Not Span Hosts” option.

Of course you want to span hosts in Lab Manager 4 !!