Serial Number no found by default

Hello Team,

We have identified the serial number for CIsco devices, but not able to do the same for aruba, juniper, bluecoat....

When we riasie support case, we get to know it is not supported and HPE files a ER requrest for the same. 

I wanted to check here, do any other team has same issue. If yes, How do they resolve.

Thanks

Chandan