# For All Agent Install modes

When an Instance is provisioned and the Agent does not install, verify the following for any agent install mode:

- The VM Essentials `appliance_url` (Administration > Settings) is both reachable and resolvable from the provisioned node.
- The `appliance_url` begins with to `https://`, not `http://`.

NOTE

Be sure to use `https://` even when using an IP address for the appliance.

- Inbound connectivity access to the VM Essentials Appliance from provisioned VMs and HVM cluster hosts on port 443 (needed for Agent communication)
- Private images (those not provided with VM Essentials by default) must have their credentials entered. These can be entered or edited in the Library > Virtual Images section by clicking the edit button (pencil icon) next to the appropriate image.

NOTE

Administrator user is required for Windows agent install.

- The Instance does not have an IP address assigned. For scenarios without a DHCP server, static IP information must be entered by selecting the Network Type: Static in the Advanced section during provisioning. IP Pools can also be created in the Infrastructure > Network > IP Pools section and added any Cloud’s network section for IPAM.
- DNS is not configured and the node cannot resolve the appliance. If DNS cannot be configured, the IP address of the VM Essentials appliance can be used.
