Summary:ASTERISK-19822: EWS Calendar Integration Problem
Reporter:Bharat Lalcheta (lalcheta)Labels:
Date Opened:2012-05-01 07:09:01Date Closed:2012-05-01 08:05:18
Versions: Frequency of
Environment:Ubuntu 11.10 neon 0.29.6Attachments:
Description:Hiii all,

I am using asterisk and compile all modules related to calendar.

neon version is 0.29.6. OS is ubuntu 11.10.

I configured ical for zimbra, caldav for google mail and ews for exchange 2010 calendar.

ical and caldav setup working fine and i am getting my calendar events perfectly. But for exchange 2010 calendar i am getting following error.

"Unable to communicate with Exchange Web Service at 'https://ex1.domain.com/EWS/Exchange.asmx': Could not authenticate to server: ignored NTLM challenge, GSSAPI authentication error: Unspecified GSS failure.  Minor code may provide more information: Credentials cache file '/tmp/krb5cc_0' not found"

my calendar.conf is as follows

type = ews               ; type of calendar--currently supported: ical, caldav, exchange, or ews
url = https://ex1.domain.com/EWS/Exchange.asmx ; URL to MS Exchange EWS
user = myname@domain.com              ; Exchange username
secret = xxxxxx       ; Exchange password
refresh = 10             ; refresh calendar every n minutes
timeframe = 20

calendar show status command shows following output

Calendar             Type       Status
--------                   ----         ------
calendar3            ews        free  

Please help me out for solve above problem.
Comments:By: Matt Jordan (mjordan) 2012-05-01 08:05:11.007-0500

This appears to be a configuration issue with your authentication mechanism with Exchange, and is not a problem with the res_calendar_ews module.  Some quick googling of the error message being returned from Exchange "ignored NTLM challenge, GSSAPI authentication error: Unspecified GSS failure" resulted in a large number of similar results from other systems.  Specifically, you may want to refer to http://research.imb.uq.edu.au/~l.rathbone/ldap/gssapi.shtml.