The OVH library available for Dedicated Cloud VMMs it has ISOs and VHDs available in a library.

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Library

You create the template in the VMM's library:

OVH library

OVH provides ISOs and VHDs so you can begin using the VMM easily.
ISOs can be uploaded to VMs, and VHDs can be used for creating VMs/templates.

Client library

OVH provides a storage space which is used as a library. Here you can upload your own VHDs/ISOs.