How to enable printer browsing

ServerName vpn.ourdom.com
ServerAdmin printmaster@ourdom.com
LogFilePerm 0600
# FontPath: the path to locate all font files (currently only for pstoraster)
#FontPath /usr/share/cups/fonts
# LogLevel: none, error, warn, info, debug, debug2
LogLevel info
MaxLogSize 2000000000
#PreserveJobHistory Yes
#PreserveJobFiles No
#AutoPurgeJobs No
#MaxCopies 100
#MaxJobs 500
#MaxJobsPerPrinter 0
#MaxJobsPerUser 0
#MaxPrinterHistory 10
Printcap /etc/printcap
#PrintcapFormat BSD
#RemoteRoot remroot
#FaxRetryLimit 5
#FaxRetryInterval 300
#ServerCertificate /etc/cups/ssl/server.crt
#ServerKey /etc/cups/ssl/server.key
<Location />
Order Deny,Allow
Allow From 127.0.0.1
Allow From 10.20.*.*
</Location>
<Location /admin>
AuthType Basic
AuthClass System
Order Deny,Allow
Allow from 127.0.0.1
Allow from 10.20.*.*
</Location>
Browsing On
BrowsePoll print.ourdom.com
Listen localhost:631
Listen cups.ourdom.com:631

LogLevel warning
SystemGroup lpadmin
ServerName ttk.ourdom.com
ServerAdmin printmaster@ourdom.com
Listen *:631
Listen /var/run/cups/cups.sock
Browsing On
BrowsePoll cups.ourdom.com
BrowsePoll print.ourdom.com
Printcap /etc/printcap
PrintcapFormat BSD
DefaultAuthType Basic
<Location />
  Order Deny,Allow
  Allow from 127.0.0.1
  Allow from 10.20.*.*
</Location>
<Location /admin>
  Order Deny,Allow
  Allow from 127.0.0.1
  Allow from 10.20.*.*
</Location>
<Location /admin/conf>
  AuthType Default
  Require user @SYSTEM
  Order Deny,Allow
  Allow from 127.0.0.1
  Allow from 10.20.*.*
</Location>
<Policy default>
  <Limit Send-Document ...>
    Require user @OWNER @SYSTEM
    Order deny,allow
  </Limit>
  <Limit CUPS-Add-Modify-Printer ...>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
  </Limit>
  <Limit Pause-Printer ... CUPS-Reject-Jobs>
    AuthType Default
    Require user @SYSTEM
    Order deny,allow
  </Limit>
  <Limit Cancel-Job CUPS-Authenticate-Job>
    Require user @OWNER @SYSTEM
    Order deny,allow
  </Limit>
  <Limit All>
    Order deny,allow
  </Limit>
</Policy>