Hi We have around 40 iPhone 4's in the company. All of them are connected with an Exchange account and uses it to sync mails, appointments and contacts. We occassionally experience that some appointments are missing on the iPhone. If we check the users Outlook calendar everything is looking fine. I can't figure out what is going wrong. Some times it helps to disable Exchange sync and enabling it again, but that's not usable. Lasse/Lasse

Sometimes inconsistant calendaring issues can be related to multiple devices. Do these users have anything in common particularly if they are running Outlook on more than one computer? Do they also have delegates? See if you can find a common configuration for these users. James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Here is a list of some of the majpr issues: Current issues with Microsoft Exchange ActiveSync and third-party devices It's very important also that all the mobile devices are running the latest iOs.

Every user has a iPhone 4 and a iPad 2, and both the devices are configured with Exchange ActiveSync. We have a "open calendar"-policy, so every secretary has access to create and delete items in all our users calendars. In this case a secretary creates an appointment in User A's calendar by selection the time periode in Outlook and typing the necessary text, afterwards she just copies the appointment to User B, C and D's calendar, just by dragging and dropping in to the other users calendar. My boss also has the problem. Yesterday we tried deleting my Activesync profile on my iPhone 4 with IOS 5.1 and setup my bosses Exchange account on my phone, and it was the exact same problem, the appointment that wasn't shown on her iPhone 4 IOS 4.3.5 also wasn't shown on my iPhone 4 with the latest IOS. I will take a look at the list from Microsoft regarding issues with Activesync./Lasse

The only common thing I can see, is that it might be the appointments made by others that are missing./Lasse

I can't use any of the solutions from Microsoft, since none of the problems looks like ours. Synchronization of mails and contacts works perfectly, it's only some appointments that aren't shown. As I wrote earlier, it looks it only happens on appointments that the secretary creates in User A's calendar, and then copies (By drag & drop) to User B and C's calendar. We have the issue on both IOS 4.3.5, 5.0.1 and 5.1. I have never seen the issue on my own iPhone 4 but our secretaries never create appointments directly in my calendar. Lasse/Lasse