I have setup input to index DHCP log files from remote server but unable to see any data being collected or collectors appearing on main page.
Under manage\Datainputs i have done following settings set source is Monitor a File or Directory Path to the server is something like this \servername\d$\abc.log
What account are you running splunk as? Local System or a domain account? Since you are attempting to access an admin share (\servername\d$) the account splunk runs under has to be an admin on the remote server. You may be better off creating a share on your remote server and granting read access to the Splunk service account, or install a splunk regular or light forwarder on the remote server to forward the logs to your indexer.