最近因exchange凭证到期，依教学将凭证更新后，
内网使用的电脑outlook可以正常使用，
但是手机上使用ActiveSync的会认证失败，
然后凭证前前后后又做几了十几次，
还是无法解决这个问题，OWA也是正常使用
使用 https://testconnectivity.microsoft.com/ 查询
最后停在以下讯息
Certificate trust is being validated.
Certificate trust validation failed.
Test Steps
The Microsoft Connectivity Analyzer is attempting to build certificate
chains for certificate CN=XXX.com.tw.
A certificate chain couldn't be constructed for the certificate.
Additional Details
The certificate chain couldn't be built. You may be missing required
intermediate certificates.
拜托大神救救我吧!