Was receiving same error on Win 11, thanks for you fix. Question is: were you then able to successfully perform a L2TP connection from Win 11 to Meraki MX that had been changed to AES128 and DH group14? Earlier in this thread there was some mention of running: New-NetIPsecMainModeCryptoProposal Is that command needed as well and does it affect VPN to Meraki MX devices that haven't been changed? Thanks, John
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