Get the Expiration Date of Certification of Authority CRL

Hello Evrybody

I want to monitor the CRL (Certificate Revocation List) and only the following options:

Next CRL Publish

Next CRL Update

My Idea was to get this two Attributes with powershell, and write an event into the Application Log.

I found a lot of things but nothing was very helpful, now i hope somebody

did this before..

Thanks