On Prem AD Account & Office 365 Outlook AutoDiscover Issue

IF running a sit with both AD Users and Exchange On Prem and Office 365 Outlook AutoDiscover – Add Registry Keys to the below location

HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\Outlook\AutoDiscover

 Note

x.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).

ExcludeExplicitO365Endpoint
ExcludeHttpRedirect
ExcludeHttpsAutoDiscoverDomain
ExcludeHttpsRootDomain
ExcludeLastKnownGoodURL
ExcludeSCPLookup

ENSURE ALL VALUES ARE SET TO 1