Add redirect

Author: Maddy-Cloudflare

public/__redirects

@@ -499,6 +499,7 @@
 /cloudflare-one/email-security/setup/pre-delivery-deployment/prerequisites/office365-email-security-mx/ /cloudflare-one/email-security/setup/pre-delivery-deployment/prerequisites/microsoft365-email-security-mx/ 301
 /cloudflare-one/email-security/setup/post-delivery-deployment/api/office365-api/ /cloudflare-one/email-security/setup/post-delivery-deployment/api/m365-api/ 301
 /cloudflare-one/email-security/setup/post-delivery-deployment/bcc-journaling/journaling-setup/office365-journaling/ /cloudflare-one/email-security/setup/post-delivery-deployment/bcc-journaling/journaling-setup/m365-journaling/ 301
+/cloudflare-one/email-security/setup/pre-delivery-deployment/prerequisites/microsoft365-email-security-mx/ /cloudflare-one/email-security/setup/pre-delivery-deployment/prerequisites/m365-email-security-mx/ 301
 
 # firewall
 /firewall/api/cf-lists/ /waf/tools/lists/lists-api/ 301