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With June 4, 2019, update for Outlook 2016 (KB4464585), the default
behavior is changed to enable Outlook 2016 to send requests during Need
Password. If you need to revert the previous behavior, set the value of the AllowRequestsInNeedPasswordBehavior
registry key to 0.
Registry key
Location: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Security
Value Name: AllowRequestsInNeedPasswordBehavior
Type: DWORD
Values:
The default value is 3. Any values greater than 2 allow both legacy and MAPI/HTTP providers to send requests during Need Password. This could lead to an account lockout if an incorrect password is supplied.
If the value of the registry key is set to 0, it disallows both legacy and MAPI/HTTP providers to send requests during Need Password.
If the value of the registry key is set to 1, legacy providers can send requests, but MAPI/HTTP providers can't.
If the value of the registry
key is set to 2, legacy providers can't send requests, but MAPI/HTTP
can.
Keywords: Account locks out when using incorrect credential in Outlook 2016, kbHotfixAuto, CI99665