Autodiscover fails, Outlook says account is not found or password is invalid.

Autodiscover fails, Outlook says account is not found or password is invalid.

You go to https://<domain.com>/autodiscover/autodiscover.xml is accessible.  Some jack-hole web guy set up autodiscover on the website.  You can edit the registry to exclude the root domain.

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\AutoDiscover\
DWORD: ExcludeHttpsRootDomain
Value: 1

The other records you can exclude, also under the Autodiscover key are as follows. Use a value of 1 to enable, delete the key if you no longer want to exclude these checks.

DWORD: ExcludeScpLookup
DWORD: ExcludeHttpsAutoDiscoverDomain
DWORD: ExcludeHttpRedirect //I DON’T EXCLUDE THIS ONE BECAUSE I USE IT
DWORD: ExcludeSrvRecord

To resolve permanently, log into cpanel and change the email routing from Local Mail Exchanger to Remote Mail Exchanger.