Recurring meetings shifted wrongly after change of one occurrence

Question

Hello everybody,
I observe an issue with instances of recurring meetings being wrongly shifted in time after changing date of one of the instances in the respective series (repeatedly and for different meetings/meeting series). It looks as if my current "distance" to UTC (including DST adjustment) is "re-applied" to the meeting instance (i.e. the meeting is shifted 2 hours forward compared to the original time; my timezone is GMT+1 and together with the current DST shift it equals to those 2 hours).
I use Q10 (SQN100-3, SW 10.1.0.1666) together with the BB Enterprise Server (BES) connected to MS Exchange plus MS Outlook 2007 on the desktop.
I haven't managed to discover all the dependencies and reproduce it reliably but the pattern is as follows:
- I have a recurring meeting (typically for half a year).
- I open one of the meeting instances in MS Outlook and change its date (e.g. move it by one week but without changing the starting and end time). An updated meeting invitation is sent to other meeting participants (I can see that it is correct in my "Sent" folder in MS Outlook and it also appears correctly in the MS Outlook calendar).
- Other meeting participants respond to my update request (I suspect that the problem is related to processing of these responses, but I cannot prove this suspicion).
- Later on I check my calendar (either on Q10 or MS Outlook) and realize that the meeting is wrongly shifted by 2 hours (or I don't realize it early enough and others start planning other meetings during the original timeslot since it appears free in my schedule on MS Exchange :-((( ). When checking the Sent folder in MS Outlook, there is no message about any further update of the meeting (which means that I couldn't have shifted the meeting by mistake myself, because MS Outlook 2007 simply doesn't allow you to save a meeting with changed times without sending an update request to other attendees); obviously, all the other participants still have the meeting scheduled with the right (original) time in their calendars.
I should add that this clearly started happening after I changed my BlackBerry device to the new BB10 version - nothing similar ever happened to me with the older BB devices (and corresponding BES version).
Anyone observing something similar? Is posting this information here sufficient for having someone from the developers having a look at this issue, or is there some other way how to pass it to the right people?
Thanks
Tomas

Answer 1

Hi again,
I have further analyzed the issue in order to find out dependencies on why it is shifted sometimes and sometimes not:
First of all, I can confirm that the shift is immediately triggered by opening certain invitation responses on my BlackBerry Q10 (while opening some other invitation responses does not trigger the issue). In other words - if I check the event on BlackBerry calendar just before opening the particular response from BlackBerry Hub and right after opening it, I can observe that it moved in the meantime.
Apart from the (so far confirmed) fact that it apparently happens only for irregular appointment instances from appointment series (as already indicated in my original submission), I have noticed that even different responses do or do not trigger the issue. In particular, I have noticed that responses from certain e-mail/calendar clients include information about the event with _wrong_ timezone information (as an example, a response from certain Windows Phone client ("PRODID=Microsoft Windows Phone") refers to "TZID=W. Europe Standard Time") and this response does _not_ trigger the issue, whereas a response coming from MS Outlook ("PRODID=Microsoft Exchange Server 2007") and correct timezone information (TZID="(GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague") _does_ trigger the issue. Obviously, the main issue is that invitation response should naturally _never_ trigger any update of the original event...
Hoping that this helps anyone to address the issue soon...
Tomas