We currently have a small c# script that pulls a calendar appointment from Siebel OnDemand and mails it out to our users using smtp. This all worked before we migrated some users to Exchange 2007 this weekend. Now the .ics calendar file doesn't show up for those that have been migrated but still show up for those who haven't.
The Exchange team says there isn't a problem with our servers.
Has anyone seen this type of problem? Any solutions?