Hi group, I was trying to write a free busy look up query to query the calendar server which looks like POST calendars/__uids__/3F23826D-26EC-4621-BA07-FD001E6DEFBF/outbox/ HTTP/1.1 Host: www.XXX.com:XXXX Authorization: Digest username="temp", realm="/Search", nonce="8694934201095829038326975621", uri="calendars/__uids__/3F23826D-26EC-4621-BA07-FD001E6DEFBF/outbox/", response="9c5b7e7a06eac5314bf8659a4d5869aa", algorithm="md5" Content-Length: 429 Content-Type: text/calendar BEGIN:VCALENDAR VERSION:2.0 PRODID:-//PYVOBJECT//NONSGML Version 1//EN BEGIN:VFREEBUSY UID:1234 DTSTART:20090404T000000 DTEND:20090405T000000 ATTENDEE:principals/__uids__/C84721CA-2800-40B6-AF6C-E78E00124218/ DTSTAMP:20090610T171240 ORGANIZER:/principals/__uids__/3F23826D-26EC-4621-BA07-FD001E6DEFBF/ SUMMARY:Availability for principals/__uids__/C84721CA-2800-40B6-AF6C-E78E0 0124218/ END:VFREEBUSY END:VCALENDAR here the URL of the POST is my outbox URL URL of the ATTENDEE is the URL of the principal of the Attendee URL of the Organizer is my principal URL but the server always reply with HTTP/1.1 405 Method Not Allowed Content-Length: 213 Server: Twisted/2.5.0 TwistedWeb/[twisted.web2, version 0.2.0] DAV: 1, access-control Allow: ACL, COPY, DELETE, GET, HEAD, LOCK, MKCOL, MOVE, OPTIONS, PROPFIND, PROPPATCH, PUT, REPORT, TRACE, UNLOCK Date: Wed, 10 Jun 2009 22:12:40 GMT Content-Type: text/html <html><head><title>405 Method Not Allowed</title></head><body><h1>Method Not Allowed</h1>The requested method POST is not supported by calendars/__uids__/3F23826D-26EC-4621-BA07-FD001E6DEFBF/outbox/.</body></html> Can you please suggest what is the error,, I checked ical using tcpflow and even it is doing kind of same thing,, but I am not able to figure out where is the error Thanks Arun