Little time ago, I start testing and implementing Microsoft Search server 2010, generally for crawling Exchange 2007 public folders, but if I don't have problems crawling file server, then with Exchange 2007 public folders I get only errors.
Error when crawling is - Error while crawling LOB contents. ( The operation has timed out )
1) OWA sits on https, https give error like - Error while crawling LOB contents. ( The request failed with HTTP status 403: Forbidden. )
2) Already played with farm time-out settings, now sit on 180/180 with no changes.
3) Month ago I could crawl folders, where all messages are identical with single pdf attachment, but couldn't crawl folder where sits emails from client. Crawling ended with some error with hexadecimal cannot be xxx.