I remember having these same issues, but it has been so long since I have troubleshot the IIS pools so I couldn’t tell what is wrong. Typical Orchestrator install issues involve access to the database server (like credentials) or something in the Web.config is wrong.
If you haven’t already, I would suggest using technical support for this, unless you can find an answer on the forums. Contact Technical Support
Also, here are some troubleshooting steps, in case they apply: The underlying provider failed on Open / Orchestrator server is down - Troubleshoot steps
Regards.
Anil_G
ashokkarale
Yoichi
Kismet_Tosun
marina.dutta
pica
VitaminJapan2
Juan_Felipe_Carvajal
SorenB
Kiran-Kishore