OpenVpn with microsorft client recipe

is there anyone who succesfully created a setup with certificate with windows openvpn client****
we are stuck at key usage error. the client seem to require an extended key usage wich is not provided in the certificate

Mon Oct 31 11:15:31 2016 Validating certificate key usage
Mon Oct 31 11:15:31 2016 ++ Certificate has key usage 00b4, expects 00a0
Mon Oct 31 11:15:31 2016 ++ Certificate has key usage 00b4, expects 0088
Mon Oct 31 11:15:31 2016 VERIFY KU ERROR
Mon Oct 31 11:15:31 2016 OpenSSL: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

any hints welcome!