OpenVPN + Radius + AD + Google Auth - Case Sensitive Logon names

[DaMiBu]

When using OpenVPN authenticating with AD via Radius and Google Authentication enabled usernames are case sensitive. I opened a ticket with OpenVPN and they say the only workaround is to use LDAP rather than Radius which in my setups I cannot do (nor do I want to do this).

My question here is there a workaround? Wondering if there is a Radius setting I can apply to stop usernames being case sensitive as this is by far our #1 support issue with OpenVPN.

Anyone any suggestions?

Thank you!