Possible to inspect HTTPS inspection without installing it on users pc?

You're going to need "root" access to install the certificate that tells the computer to trust the Sophos as an intermediate hop. It's fundamental to the trust process of HTTPS encryption/decryption.

Suggest to read this post: https://community.sophos.com/products/xg-firewall/f/staff-picks/115205/https-faq-in-xg

Hi ken9000,

I'm begginer to Sophos, so can you guide me  how to do that?

Hi subodha kumara 

Please refer to the article, to scan, to block and to analyze HTTPS traffic scanning is a must.

https://community.sophos.com/kb/en-us/132997, the article contains all the required details.