Mitigation, can use the "tls-remote" property, set on the UI via
"Advanced -> TLS Authentication -> Subject match" to the X509 name on
the server's local certificate used for TLS authentication.

e.g.
"/C=NA/ST=None/L=None/O=Mullvad/CN=m3.mullvad.net/emailAddress=i...@mullvad.net"

To get this value, 
1. export the VPN config (after adding a dummy value in above field)
2. edit file generated to remove the user and group lines and add a line "verb 
3"
3. run from command line
    openvpn --config <filename>
4. From the output pick out the expected value (example above) where it shows 
an error

Limitation: If your VPN service has mutiple servers (resolved via DNS)
this will only work for one of them at a time.

Shreepad

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https://bugs.launchpad.net/bugs/593087

Title:
  missing remote-cert-tls server on client

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