During the deployment process in the Cloud DR Add-on, you are required to provide your cloud account information. Although it is possible to change the keys after the deployment, changing the account is not supported.
If you need to replace the account that you are using:
When using Cloud DR Add-on or PowerProtect DP, you will need to install a new external Cloud DR Add-on and connect it to your new cloud account
When using RecoverPoint for VMs, you can remove the cloud account and add another one using the RecoverPoint for VMs vCenter plugin.
When using PowerProtect Data Manager, it is not supported to change or connect to another cloud account.