Office 365 MDM and Outlook profile creation

One option may be to use device access rules in EOL.

If you set the default ActiveSync rule to block all devices but allow only those in which a specific rule is enabled, you can prevent the use of the native iOS and Android mail apps.  You would need to configure a device access rule to specifically allow the Outlook device family, which is Outlook for iOS and Android (not Outlook desktop clients).  This will not prevent the native mail apps from being configured, but will result in a conditional access message to the native app indicating that the Outlook app is required.  No data would be synced or pushed to the native mail app other than the conditional access message.

https://technet.microsoft.com/en-us/library/dn792010.aspx

https://technet.microsoft.com/en-us/library/dd876923(v=exchg.160).aspx