The certificates in the earlier versions are due to expire on June/28 2018.
I checked the following site but cannot find a new version.
When will a new version be released?
Do we have to wait until June?
Thank you in advance for your help
I wouldn't expect any new versions, AMS has reached it's end of life.
Please download the new PHDS certificates (Expiration: 2/14/2020) from here - Shared Files - Acrobat.com
; and here are the steps to update -
To update certificates, replace the following files in installation directory and restart the server: