If you are talking about for a meeting in Outlook I have not had that problem. I am able to invite an attendee after a hard reset without having to resend the service books. I am also on a BES so I don't know if that makes any difference.
i actually lost the ability on my 8300 ATT for a while with a specific OS upgrade. I could delete and resend ALL service books and not get it back. I upgraded the OS to the next one and havent had a problem since.
This happened to me also. I do not know if it was cause by a hard reset though. I just noticed one day that I no longer had the option or field to Invite Attendees to Calendar appointments. I upgraded the Bberry OS and my desktop manager, but that did not help. I found this post and I resent the service books to my 8100 Pearl and that brought back the option to Invite.
My friend has the same problem. Missing "invite attendee" function in calendar.
He is using BB8310 v220.127.116.11, BIS, and his email is on IMAP server type.
Possibilities to resolve this problems are hard reset and to resend service books.
I believe that reloading or updating the BB OS is not the solution here. What else can he do to get this function?? Are there any technicals, software or server type reasons to not have this functions in generally??
I also have this problem. I am using an 8320 TMO, 18.104.22.168 and sync via Desktop Mgr (4.3 I think) to outlook. I deleted the "Desktop" service books, resent the BIS service books and now have the "invite attendee" function in calendar.
But I am pretty sure if I sync with my desktop that I'll lose the "invite attendee" function. Any thoughts or suggestions?