we are on exchange 2007 and outlook 2010. I have issue with one of our directors calendar, it is delegated to executive assistant and she does most of the calendar management. For some calendar meetings if they want to check other attendee details they are getting message "Attendee list unavailable" . This happening for both director and his assistant, even I tried his mailbox from my outlook by mapping as a mailbox, resulted is same. We tried all possible options including deleting mailbox and recreated in a new cluster. Any suggestion? Thanks

Hi, We are on exchange 2007 and win7/outlook 2010. I have issue with one of our directors calendar, it is delegated to executive assistant and she does most of the calendar management. For some calendar meetings if they want to check other attendee details they are getting message "Attendee list unavailable" . This happening for both director and his assistant, even I tried his mailbox from my outlook by mapping as a mailbox, resulted is same. We tried all possible options including deleting mailbox and recreated in a new cluster. Any suggestion? Thanks

Based on my research this issue can occur if the mailbox is a Room type mailbox. So please run Get-Mailbox |FL and verify the value of RecipientType. The expected value is UserMailbox. If the value is correct, let me know in detailed that how delegate check the attendee details so that I can try to reproduce in my local lab. Thanks. Fiona Liao TechNet Community Support