The primary source is the HPE Intelligent Provisioning Recovery Media page.
While it's usually pre-installed on the server's NAND flash, there are times when you need a fresh to repair a corrupt installation or upgrade to the latest version. Where to Download Intelligent Provisioning Recovery Media hp ml350p g8 intelligent provisioning download
If the main link is unavailable, search the HPE Support Portal by entering "ML350p Gen8" and filtering for "Software - CD-ROM". Installation & Reinstallation Steps The primary source is the HPE Intelligent Provisioning
If your server doesn't launch IP when you press during POST, follow these steps to reinstall it using the recovery ISO: hp ml350p g8 intelligent provisioning download