Redirecting http to https using mod_proxy

[Gareth.Segree@xxxxxxxxxxxxx]

I want to redirect users whenever they
type http://webmail.example.com they are redirected to localmail.example.com

The local server is local server is
localserver.gleanerjm.com

the apache2.conf is as follows:

<VirtualHost *>
   ServerName webmail.example.com
   ProxyPass / https://localwebmail.example.com
   ProxyPassReverse / https://localwebmail.example.com
   <Location />
   Order allow,deny
   Allow from all
   </Location>
</VirtualHost>

The user is seeing localserver.example.com:8080
in their browser.
How can I fix this to redirect the user
from http to https

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