Restore CSR configuration

Create a folder named backup inside ..\reporter\conf\ path
copy the backup.xml to ..\reporter\conf\backup\ folder
If you are restoring a 2.7 or older version of CSR backup.xml then, copy the backed up keystore.jks file into ..\reporter\jboss\standalone\configuration\ If you are restoring the 2.8 or above version of CSR backup.xml then, first, rename the backed up csr.keystore as csr.keystore.old and then copy it to \reporter\jboss\standalone\configuration\ folder
Restart the CSR service
Navigate to Registered Servers > Report Server > Actions > Edit > Details in ePO
Do test settings. If it fails then please refer Reset the CSR passkey.

If it is successful, click on save. Now you can access Report Server Settings page.