Run Microsoft Support and Recovery Assistant to diagnose the issue.
1.Start Registry Editor.
In Windows 10 and Windows 8, press the Windows Key + R to open a Run dialog box. Type regedit.exe and then press OK.
In Windows 7, click Start , type regedit in the Search programs and files box, and then press Enter.
2.Locate and then select the following registry subkey:
Notex.0 in this registry path corresponds to the Outlook version (16.0 = Outlook 2016, 15.0 = Outlook 2013, 14.0 = Outlook 2010, 12.0 = Outlook 2007).
3.Review the following possible DWORD values that may be located under the \Autodiscover subkey.
•ExcludeHttpsRootDomain – ignores Autodiscover.XML on domain website
•ExcludeScpLookup – Ignores local hosted exchange settings
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