Autodiscover not found by Android mobile devices

Symptoms

When you configure an Android mobile device, the server address's prefix is missing.

However, the autodiscover configuration is good according to the online diagnostics at https://testconnectivity.microsoft.com/tests/exchange.

Issue

Android has a distinct behavior if the email address's domain is resolved at the DNS level: if a website (other than BlueMind) exists at the address https://"bluemind.domain.com", then Android attempts to retrieve the autodiscover configuration from https://"bluemind.domain.com"/autodiscover (or https://"bluemind.domain.com"/Autodiscover)

Resolution

Configure the website so that it sends https requests to BlueMind:

location /autodiscover {
    rewrite ^(.\*) https://bluemind.domain.com$1?$args permanent;
}

location /Autodiscover {
    rewrite ^(.\*) https://bluemind.domain.com$1?$args permanent;
}