A strange little problem's come to light over the past few weeks - We upgraded to exchange 2010 around Christmas time and most things have been fine, but recently we've had some users complaining that email attachments aren't sending as they should. It's only happening to a handful of people and not consistently either. When it goes wrong a user is sending an email to multiple recipients, but the attachment doesn't go to everyone, usually just one person. Had a situation this morning where a partner sent his secretary an attachment as well as sending the mail to an external account - the attachment made it out, but not to the secretary he'd CC'd in. He then sent the attachment to her without any other recipients and it worked fine.
I've tried replicating this, sending emails to my hotmail account, CC'ing my internal email address in and vice versa and the attachments come through fine. :/
Users are either on Outlook 2000 or 2003 - could this be some incompatibility between Ex2010 and the earlier client versions?
Not sure if this issue only happens when recipients are CC'd or if they're included in the 'to' field as well.
Any of Teh Hive mind got any ideas?
Ta muchly!