Update readme.md

Updated info related to using the KeyVault to store the API Key.

Solutions/CohesitySecurity/Playbooks/Cohesity_Restore_From_Last_Snapshot/readme.md

@@ -3,20 +3,22 @@
 This playbook restores the latest good Helios snapshot. It’s recommended for running by Backup Admins _only_ after they make sure that the existing data is compromised and rollback to the previous snapshot, even at the expense of data loss, is _really required_.
 
 ## Prerequisites
-1. Create _DataHawk API_ key:
+1. Create the _DataHawk API_ key:
 * Go to the Cohesity Helios [login](https://helios.cohesity.com/#/login) page.
 * Enter your credentials and select _Log In_. The _Summary_ page is displayed.
 * Navigate to _Settings > Access Management_. The _Users_ tab is displayed.
 * Select _Add API Key_. The API Key Details is displayed.
 * Enter a name for the API key.
 * Select _Save_.
+2. Create your Azure KeyVault (see [instructions](https://learn.microsoft.com/en-us/azure/key-vault/general/quick-create-portal)).
+* Create the _ApiKey_ secret and assign the _API Key_ value from the previous step to it. Now your API key is securely saved in the Azure KeyVault.
 
 ## Deployment instructions
-1. Deploy the playbook by clicking on "Deploy to Azure" button. This will take you to deploying an ARM Template wizard.
+1. Deploy the playbook by clicking on the "Deploy to Azure" button. This will take you to deploying an ARM Template wizard.
 [![Deploy to Azure](https://aka.ms/deploytoazurebutton)](https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.githubusercontent.com%2Fcohesity%2FAzure-Sentinel%2FCohesitySecurity.internal%2FSolutions%2FCohesitySecurity%2FPlaybooks%2FCohesity_Restore_From_Last_Snapshot%2Fazuredeploy.json)
 2. Fill in the required parameters:
 * __Playbook Name:__ Enter the playbook name here.
-* __API Key:__ Enter your DataHawk API key.
+* __KeyVault Store Name:__ Enter your KeyVault store name here.
 
 ## Post-Deployment instructions
 1. (_Recommendation_) Limit access rights to this playbook to only Backup Admins because this playbook rolls back customer data that can result in a loss of important data if used without a good reason.
@@ -26,13 +28,5 @@ This playbook restores the latest good Helios snapshot. It’s recommended for r
 * Select the required resource group and click _Apply_.
 * Select _Done_.
 
-## Troubleshooting
-1. If you need to update your API key in the playbook, follow these steps
-* In your Microsoft Sentinel Instance, go to the _Automation_ under the _Configuration_ pane.
-* Under _Active Playbooks_, select the playbook and click on _Edit_.
-* Select the _HTTP connector_.
-* Under the _Headers_ section, enter the API key generated on Helios platform.
-* Select _Save_.
-
 #  References
  - [Cohesity support documentation](https://docs.cohesity.com/ui/login?redirectPath=%2FHomePage%2FContent%2FTechGuides%2FTechnicalGuides.htm)