External Windows 10 client - VPN ?

You can use  ssl vpn, it is fairly easy, refer to the docs here https://community.sophos.com/kb/en-us/122769 , they are written for v15 but the vpn is tab is fairly similar in functionality in v16. There is a video on youtube also (not my creation) if you like visual instructions better https://www.youtube.com/watch?v=3_mNelRqLyw 

Hope this helps.

You can use  ssl vpn, it is fairly easy, refer to the docs here https://community.sophos.com/kb/en-us/122769 , they are written for v15 but the vpn is tab is fairly similar in functionality in v16. There is a video on youtube also (not my creation) if you like visual instructions better https://www.youtube.com/watch?v=3_mNelRqLyw 

Hope this helps.

Thanks, 

after I had found the Internal "download page" of my SSL VPN client it works fine ;) 

Thank you.