If one of the users affected was invited to a meeting that has someone with a BES account - even if they don't have someone themselves - it can happen.
I think that Calendar Diagnostics was an Exchange 2010 feature (Get-CalendarDiagnosticLog). BES keeps some pretty detailed logs. Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com From: Fergal O'Connell [mailto:foconn...@curamsoftware.com] Sent: Wednesday, June 08, 2011 7:04 AM To: MS-Exchange Admin Issues Subject: RE: Missing Calender appointments No, v4.1.7 One of the users affected does not have a BES account. So I don't think it's Blackberry related. Is there logs I can check on the Exchange server? From: Michael B. Smith [mailto:mich...@smithcons.com] Sent: 08 June 2011 12:00 To: MS-Exchange Admin Issues Subject: RE: Missing Calender appointments Are you at BES 5.03? Highly recommended. Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com From: Fergal O'Connell [mailto:foconn...@curamsoftware.com] Sent: Wednesday, June 08, 2011 3:43 AM To: MS-Exchange Admin Issues Subject: Missing Calender appointments HI Folks, I have had a few people including myself whereby we Calendar appointments just went missing from Outlook so far 3 people have noticed this. In my case I was sitting there looking at my calendar and boom an appointment just vanished. 2 other people reported the same problem at exactly the same time a while later. We are using Exchange 2007 Sp1 all using outlook 2010. No network issues at the time. No errors in the event log of the Exchange server All users are using a Blackberry and I'm still looking at the logs there. Can anyone assist in where I should be looking exactly to find the root cause of this issue? Regards Fergal O'Connell ICT Network Support CĂșram Software Phone : +353 1 4323212 Emailto: foconn...@curamsoftware.com<mailto:foconn...@curamsoftware.com> The information in this email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. If you are not the intended addressee please contact the sender and dispose of this e-mail. Thank you. --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist The information in this email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. If you are not the intended addressee please contact the sender and dispose of this e-mail. Thank you. --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist