Hi mallempatisreedhar,
You did not provide a lot of information, so this will be a very generic answer.
But the more important question is: what tool will you use to upgrade the universal forwarder?
One thing to start with: even it is possible you should not use Splunk deployment server to upgrade an universal forwarder.
So, here is a list of examples based on the tool you might use:
if you use Puppet -> https://answers.splunk.com/answers/58396/puppet-module-to-deploy-universalforwarder.html
if you use Chef -> https://github.com/chef-cookbooks/chef-splunk
if you use Ansible -> https://galaxy.ansible.com/scathatheworm/splunk-forwarder/
if you use another tool, ask Google for help there are a lot of instructions available.
Hope this helps ...
cheers, MuS
