Can't create a mail profile on an iOS device by using Autodiscover

  • Article
  • Applies to:
    Exchange Online, Exchange Server 2016 Enterprise Edition, Exchange Server 2016 Standard Edition, Exchange Server 2013 Enterprise, Exchange Server 2013 Standard Edition, Exchange Server 2010 Enterprise, Exchange Server 2010 Standard

Original KB number:   3150466

Symptoms

Mobile devices that are running iOS7 and later versions cannot automatically configure the default mail app for an Exchange Online mailbox or on-premises Exchange Server mailbox. When a user tries to verify their account, a message is displayed that says that their identity can't be verified by Exchange.

Cause

The Autodiscover request for the secure root domain (https://contoso.com/Autodiscover) has an untrusted certificate. The root domain presents a certificate that doesn't match the HTTPS root domain name.

Resolution

Make sure that the certificate matches the user's SMTP domain, or manually configure account settings for the Exchange Online mailbox.