Autodiscover.xml generator in PHP for Outlook (and other) mail client configuration.

autodiscover.php

<?php
//get raw POST data so we can extract the email address
$data = file_get_contents("php://input");
preg_match("/\<EMailAddress\>(.*?)\<\/EMailAddress\>/", $data, $matches);

//set Content-Type
header("Content-Type: application/xml");
echo '<?xml version="1.0" encoding="utf-8" ?>'; ?>

<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
    <Response xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a">
        <Account>
            <AccountType>email</AccountType>
            <Action>settings</Action>
            <Protocol>
                <Type>IMAP</Type>
                <Server>example.com</Server>
                <Port>143</Port>
                <DomainRequired>off</DomainRequired>
                <LoginName><?php echo $matches[1]; ?></LoginName>
                <SPA>off</SPA>
                <SSL>auto</SSL>
                <AuthRequired>on</AuthRequired>
            </Protocol>
            <Protocol>
                <Type>POP3</Type>
                <Server>example.com</Server>
                <Port>995</Port>
                <DomainRequired>off</DomainRequired>
                <LoginName><?php echo $matches[1]; ?></LoginName>
                <SPA>off</SPA>
                <SSL>on</SSL>
                <AuthRequired>on</AuthRequired>
            </Protocol>
            <Protocol>
                <Type>SMTP</Type>
                <Server>example.com</Server>
                <Port>587</Port>
                <DomainRequired>off</DomainRequired>
                <LoginName><?php echo $matches[1]; ?></LoginName>
                <SPA>off</SPA>
                <Encryption>TLS</Encryption>
                <AuthRequired>on</AuthRequired>
                <UsePOPAuth>off</UsePOPAuth>
                <SMTPLast>off</SMTPLast>
            </Protocol>
        </Account>
    </Response>
</Autodiscover>

htaccess.txt

RewriteEngine On
# Blocks all autodiscover requests to prevent 404 errors in the log
#RewriteCond %{REQUEST_URI} ^/autodiscover/autodiscover.xml [NC]
#RewriteRule .* - [F,L]

RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]
RewriteRule ^.*$ autodiscover.php [NC,L]

named.conf

_autodiscover._tcp.example.com. SRV 10 10 443 autodiscover.example.com.

sample-request.xml

<?xml version="1.0" encoding="utf-8"?>
<Autodiscover xmlns="https://schemas.microsoft.com/exchange/autodiscover/outlook/requestschema/2006">
    <Request>
        <EMailAddress>user@example.com</EMailAddress>
        <AcceptableResponseSchema>https://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a</AcceptableResponseSchema>
    </Request>
</Autodiscover>

sample-response.xml

<?xml version="1.0" encoding="utf-8" ?>
<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
    <Response xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a">
        <Account>
            <AccountType>email</AccountType>
            <Action>settings</Action>
            <Protocol>
                <Type>IMAP</Type>
                <Server>example.com</Server>
                <Port>143</Port>
                <DomainRequired>off</DomainRequired>
                <LoginName>user@example.com</LoginName>
                <SPA>off</SPA>
                <SSL>auto</SSL>
                <AuthRequired>on</AuthRequired>
            </Protocol>
            <Protocol>
                <Type>POP3</Type>
                <Server>example.com</Server>
                <Port>995</Port>
                <DomainRequired>off</DomainRequired>
                <LoginName>user@example.com</LoginName>
                <SPA>off</SPA>
                <SSL>on</SSL>
                <AuthRequired>on</AuthRequired>
            </Protocol>
            <Protocol>
                <Type>SMTP</Type>
                <Server>example.com</Server>
                <Port>587</Port>
                <DomainRequired>off</DomainRequired>
                <LoginName>user@example.com</LoginName>
                <SPA>off</SPA>
                <Encryption>TLS</Encryption>
                <AuthRequired>on</AuthRequired>
                <UsePOPAuth>off</UsePOPAuth>
                <SMTPLast>off</SMTPLast>
            </Protocol>
        </Account>
    </Response>
</Autodiscover>

nslookup -q=srv _autodiscover._tcp.example.com

nslookup -q=CNAME autodiscover.domain.com