I have managed to set up a reverse proxy to enable users to access their company email from the net. I thought I was doing so well until I tried to use it today and, with out supplying any username/password I was presented with someone elses mailbox. The code i used was: ProxyRequests off ProxyPreserveHost on #OWA % character in email subject fix RewriteEngine On RewriteMap percentsubject int:escape RewriteCond $1 ^/exchange/.*\%.*$ RewriteRule (/exchange/.*) ${percentsubject:$1} [P] #OWA ProxyPass /exchange hxxp://email/exchange ProxyPassReverse /exchange hxxp://email/exchange ProxyPass /Exchange hxxp://email/exchange ProxyPassReverse /Exchange hxxp://email/exchange ProxyPass /exchweb hxxp://email/exchweb ProxyPassReverse /exchweb hxxp://email/exchweb ProxyPass /public hxxp://email/public ProxyPassReverse /public hxxp://email/public ProxyPass /iisadmpwd hxxp://email/iisadmpwd ProxyPassReverse /iisadmpwd hxxp://email/iisadmpwd Please help. I am very new to apache and have no idea if If i have missed something obvious.