[Evolution] Trouble authenticating to Exchange account

[Adam Seering <aseering gmail com>]

Hi all,
    I have access to two Exchange (EWS) accounts.  One of them works
great.  The other one won't accept my password, so I can't log in.  It
worked great earlier this year, but something in the server's
configuration seems to have changed.  (I don't know what.)

    If I run with EWS_DEBUG=2, I get the following request/response
pair every time I enter my password:

> POST /EWS/Exchange.asmx HTTP/1.1
> Soup-Debug-Timestamp: 1412895210
> Soup-Debug: SoupSessionAsync 1 (0x7f2091552220), ESoapMessage 1 (0x7f1fb8051910), SoupSocket 1 
> (0x7f1fada4d0b0)
> Host: [remote host]
> User-Agent: Evolution/3.13.5
> Connection: Keep-Alive
> Content-Type: text/xml; charset=utf-8

and

< HTTP/1.1 401 Unauthorized
< Soup-Debug-Timestamp: 1412895210
< Soup-Debug: ESoapMessage 1 (0x7f1fb8051910)
< Server: Microsoft-IIS/8.0
< request-id: 43bb7cf3-b66c-4b55-a41e-15f0221c01b6
< WWW-Authenticate: Negotiate
< WWW-Authenticate: NTLM
< X-Powered-By: ASP.NET
< X-FEServer: [server]
< Date: Thu, 09 Oct 2014 22:53:30 GMT
< Content-Length: 0

Looks like it's never trying to re-connect using NTLM?  Anyone have
any guesses as to what's going on, or suggestions for things to try to
do to improve it?

Thanks,
Adam