This is the second time I've been given this task of making client VPN work with PCI standards. Has anyone had any luck getting AES128 with DH Group 14 to work with Windows 10 VPN?
I never tried on my side but i'm interested in checking that as well
Have you ask Meraki to enable those as recommended in their documentation ?
It seems though they only support AES128 and DH Group 5 (and only Group2 on Windows according to other discussion)
It is my understanding that the Windows 10 client VPN doe not support group 14.
So you can ask Meraki support to enable that, but I expect your Windows 10 client VPN to break. You need to ask Microsoft to allow the use of stronger crypto for client VPN (especially since Windows 10 already supports it - just not for client L2TP VPN).
I've got this going now, and have updated my client VPN wizard to make it easy.