最近因exchange憑證到期，依教學將憑證更新後，
內網使用的電腦outlook可以正常使用，
但是手機上使用ActiveSync的會認證失敗，
然後憑證前前後後又做幾了十幾次，
還是無法解決這個問題，OWA也是正常使用
使用 https://testconnectivity.microsoft.com/ 查詢
最後停在以下訊息
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.
拜託大神救救我吧!