Support can't help and eventually used the solution in another post ([URL] Giving up the SupportAssistant OS Recovery. Download the MS Win11 ISO and inserted WLAN/NIC driver into the bootable USB for a fresh install.  I suspected that the OptiPlex 7000 is too new for the current version of SupportAssistant.   Anyway, case closed.
Just got my new OptiPlex 7000 micro. Tried to replace the M2.2230 SSD with a brand new M2.2280 SSD as the primary drive.    Tried to use SupportAssistant OS Recovery to prepare the new SSD as a new storage with SA. I tried to launch OS Recovery from SA in a USB drive (prepared with the original SSD running) or BIOSConnect. Both were struck with the notorious “Download Verification was unsuccessful. Please restart the download process.” Any clues? My last resort is to “inject” NIC/WLAN driver into an Win11 ISO image and install using USB.  [IMAGE]   [IMAGE]  
Optiplex 7000 Micro SA OS Recovery Failed