[Akonadi] [Bug 390798] New: Akonadi EWS failed to authenticate with Exchange Server

[Olivier]

https://bugs.kde.org/show_bug.cgi?id=390798

            Bug ID: 390798
           Summary: Akonadi EWS failed to authenticate with Exchange
                    Server
           Product: Akonadi
           Version: 5.7.2
          Platform: Neon Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: NOR
         Component: EWS Resource
          Assignee: kdepim-bugs at kde.org
          Reporter: olivier.dugeon at orange.com
                CC: krissn at op.pl
  Target Milestone: ---

Once configured Akonadi EWS plugin, clikc on "Test Connection work", but click
on "OK" failed and plugin remains not connected.

Once activate kio_http debug, it seems that the NTLM handshake is correctly
executed when testing the connection. Akonadi EWS try without any auth, got a
401, then try with simple NTLM v1, got 401 again, and finally try with NTLMv2
and got a 200 OK. When clicking on "OK", Akonadi EWS just try NTLMv1 and newer
try NTLMv2.

It seems that this bugs is related to old NTLM problem in kio_http patched by
the author of akonadi_ews plugin.

Note that same credential with Exchange or Thunderbird work fine and that using
a kerberos ticket allows authentication.

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