The solution is:
1. Run the Archive Manager Configuration Console
2. Click Advanced Settings, and change the top item "AfterMail URL" to "https://archivemanager"
3. In the Command Window with an Administrator account, and run "iisreset' then (talk to you IIS team if need be), you can go to the website, and find the attachment path has been changed from "http://archivemanager/...." to "https://archivemanager/...."