Hi @Vipul_Nagar,
Just renewing the self-signed certificate does essentially nothing if you don't replace the old certificate on the SVM with the new one. "You should manually remap applications associated with the old certificate to be associated with the new certificate."
You need to understand What is using the certificate on your SVM named "backup_svm"? If you have an application that is expecting a certificate from a specific CA or where you need to generate, export from ONTAP, and import to your backup product.
Once you have generated your self-signed certificate you need to apply it. CLI command reference is here security ssl modify
The commands would be something like:
ssl modify -vserver backup_svm -ca <CA> -serial <SERIAL> -common-name <common-name>
