We got one notification that Salesforce Client Certificate will be  Impacted by Upcoming Microsoft Windows Update in this link :https://help.salesforce.com/apex/HTViewSolution?urlname=Salesforce-Client-Certificate-Impacted-by-Upcoming-Microsoft-Windows-Update&language=en_US&?d=701300000021Jky&eid=ss-tc 

And have some questions

questions  for the impact :
1. 
Delegated authentication – how to know if we are using this feature ? from which page we can check if we are using this feature ?

2. SAML with default certificate – How to know if we are using this feature ? from which page we can check if we are using this feature ?
 We implemented SSO in Remedyforce ,  so if we don't updated the certificate , the users will noe be able to login to Remedyforce via SSO link ,right? 
3. 
Workflow outbound messages  - how to know if we are using this feature ? so if we don't update , all the notification emials  sent  by the workflow rule , email alert will not be able to send to the  users , right?
4.
AJAX proxy - how to know if we are using this feature ?   this is called by some applicaitons created on our side ,right? 
5.PageReference.getContent() and PageReference.getContentAsPDF() - how to know if we are using this feature ?   this is called by some applicaitons created on our side ,right? 

Questions for the Action :

1.we already have one Salesforce self-signed client certificate which is created at 2/2/2015 and used in our SSO link  , not sure if we need created another one and set it as the API Client Certificate in the API Client Certificate section in the Certificate and Key Management page  ?
2. In the Single Sign-On Settings page , We can't find the Enable Multiple Configs button , and in the  SAML Single Sign-On Settings  , we used the self-signed client certificate we created above as the Assertion Decryption Certificate, not sure if we need to change it ?