Bad outlook calendar sync

When I sync my calendar to Outlook, all the outlook times and dates are off. the clocks/dates are the same on the PC and the ipod touch. Any ideas to fix this?

I am experiencing the exact same problem... Yojimboj, did you ever find a solution?
Outlook 2007 allows setting the GMT for the calendar, and I believe the iPhone/iTouch uses whatever is provided in the sync per calendar. The only setting I saw was to state what timezone I am in currently for travel offsets. Did I miss something?
The strange part is that some calendar events have the correct date/time and others do not. Mostly, times are moved -800 hours without an obvious pattern.
Is that the same problem you were having Yojimboj?
For me, this problem occurs even after resetting the sync history and removing existing calendar data on the iPhone/iTouch.

Similar Messages

Major problems with iPhone 4 & iPad 2 both 5.1.1. - Outlook Calendar sync

Folks, really need some help here, being forced to revert to Blackberry Bold 9000 because of issues with Outlook Calendar sync since 5.1.1 upgrade on both my iPhone & iPad. Our company Enterprise Active Sync server is 2003 (please don't mention upgrade - already a seperate conversation byt all costs).
email sync's fine on both devices, plus i can continue to use both iCloud accounts, and BT yahoo mail etc !
national holidays set up in Outlook calendar come across, as does some calendar items, but then falls into a resync mode with nothing staying in the device, i can also see and read calendar invites, but once accepted, they disappear !
Searching the internet suggests I'm not alone with this issue - any ideas welcome, seems not to be a problem on os 4 !!! but A) I don't know how to regress and B) why should I ?
Many thanks in advance, please don't make me go back to a BB !!!
Finally, I've been using the devices without issue for nearly 2 years - so again it's linked to 5.1.1. upgrade !

Hi Tim
Firstly, apologies for the slow response to your very quick reply !
I've checked back, we're using Exchange 2007.
We've actually got a ticket open with Apple at present, so anticipate that a patch may be available.
It is still curious though that out of a 200 user community trialling our internal iPhone & iPad pilot, we only have 2 issues (mine and a colleagues), however anticipate that there will be more issues as nearly entire community is on 5.1.1.
On a second point, any ideas how one can rollback to 4.3.3 on an iPhone or iPad ? I can't find anything that implies a self rollback without jail breaking the device ?
Thanks again for the help.
Marc

Blackberry Outlook Calendar Sync Issue

We recently discovered a outlook calendar sync issue we can add items on the Blackberry and they will show up in Exchange. But you can’t change a calendar item from the Blackberry, e.g. if you create an item on the phone it will show up in Outlook, but if you use the phone to change the date or name of it Outlook will still show the old one.
We are running BES 4.1
We are running Exchange 2003
Exchange and BES are installed and running on different servers
OS of the server running BES 4.1 is WINDOWS 2003

Hi, Please do not post duplicate threads.
see here > http://supportforums.blackberry.com/rim/board/message?board.id=8300&message.id=37254#M37254
You are posting your message in device threads meaning normal everyday users are going to read it, if you want advice from administrators, please post it in Blackberry Enterprise Server area.
You also didn't put what full version of BES you are running! If you are running BPS, i will have it moved to the professional area.
Thankyou
If your issue is resolved, put a checkmark in the green box that contains the resolution.
OR
If it was just/or also really helpful - Give it a Kudos.. Go on Mate.. Help the rest of the clueless blackberry user world find their answer too..
~Gday from Down Under~

Outlook Calendar Sync has stopped working

Prior to iTunes 7.4.X, Outlook Calendar Sync was working OK.
Now, it does not. No new calendar entries posted in Outlook following the installation of iTunes 7.4.X make it into the iPhone.
I've tried all the usual tricks - reinstall iTunes, reset the iPhone, nothing helps.
Any ideas out there?

hi, thanks, i tried that as described here in the troubleshooting faq - no improvement.
http://docs.info.apple.com/article.html?artnum=305845
here's what i noticed however, there's not a second add-in as described in the doc. the Outlook iTunes Sync add-in is missing on the system entirely. after re-installing, iTunes, it's still not there and so can't be added through browsing to the iTunes dir and therefore i can't select it.
where can you get this second add-in? also following these instructions, i deselected the microsoft outlook mobile service add-in which sounds like it might be needed. ??
thanks for any help.

Outlook Calendar Sync Frustration

Ok....I've done it all. I've reinstalled....numerous times...earlier iTunes versions...operating systems...reduced my pst files to less than five appointments, none of which are recurring...rebuilt pst files....you name it, I've done it. My Outlook calendar still does not sync with iPhone/iTunes. I get the "outlooksyncclient.exe" has encountered a problem and needs to close..." error message. I'm inclined to subscribe to the point of view I saw from one poster that PocketMirror/Palm figured it out, Apple should be able to as well.
What really appears to be happening is that one of the two add-ins that iTunes/iPhone requires isn't being loaded. According to Apple documentation, you need "iTunes Outlook" and "Outlook iTunes Sync" add-ins. I only get the iTunes Outlook" add-in from iTunes, no matter what version I install, reinstall, deinstall, reinstall, etc. One would think that if "syncing" is the problem, you'd want to get that second "Outlook iTunes Sync" add-in loaded and seen by the OS, no?
Even when I was with a VERY good tech at the local Apple store, he didn't want to touch the issue that the add-in wasn't being loaded. To be fair, he saw it on the computer (haven't been able to locate it myself, but I saw it when he ran a registry list), but somehow it's either not being activated OR seen by iTunes. Seems to be a key player here, but the tech could only report the issue to tech support...leaving me in the dark since there is no way to follow up on the progress of the report to tech support.
Am I alone here? For a smart phone/PDA, not syncing with what is probably the most used corporate contact management software's calendar is, well, not very smart (especially right out of the gate on this cutting edge tool).
I'm not complaining about the phone features. It's LEAGUES above any phone I've seen. Having an iPod on board is just bonus. The Map widget is great too, especially linked in with the contacts (...which, by the way, seems to sync fine with Outlook...). But come on...if you can pull all that off, what's up with not being able to do the calendar? Want to lose the majority of sales folks out there that could truly benefit from this product? No sweat, just don't put a priority on fixing this Outlook calendar sync issue.
I'm posting this because I have a feeling that if I don't, and no one else voices this opinion, it won't be addressed....and this would be a shame since this product has so much immense potential.

Try this. Forgive me as I am not at my work computer but expericenced exactly the same problems.
Go to edit your email account and assuming you are using outlook 2003 since I don't 2007 you will need to find the dialog box that says something to the effect of send your information to your personal documents. It is a drop down menu within settings. You will then need to close outlook and open it again. Try syncing your iphone and this worked like a charm for me.
To sum it up your mail,contacts, and calendar entries are curetnly being stored on your work server. Iphone doesn't like that. When you tell outlook to store these items on your personal documents they then are stored on your hard drive and Iphone loves that. When I first tried doing this I noticed that I didn't have the option to send these items to my persnal files so if that is the case for you you will need to create it by clicking add and just pointing to personal files.
I hope this helps.

Itunes/Outlook Calendar Syncing Issue - UTF-8 Flavor

I have had the usual and much discussed issue of outlook calendar does not sync with iTunes. The recommendations have been to remove iTunes and re-install, even blow away all the configuration files as well, and it even worked for me once. But not this time.
I was running Windows XP, and all of a sudden the Outlook 2007 calendar just stopped syncing. I upgraded from XP to 8.1, and that was not fun, but inevitable, and still didn’t correct the problem. Now, if you never upgraded from XP to 8.1 – you can’t – at least it is not a direct flight. First, you have to upgrade from XP to 8.0, then from 8.0 to 8.1, and there is no upgrade in place from XP to 8.0. So what does an upgrade in place mean? Your applications and profiles are not carried over. Just your data (if you ask nicely) is carried over – but all applications have to be re-installed from scratch, and reactivated if there was license activation.
So, forget about re-install of iTunes, I changed OS, reinstalled iTunes and Office 2007 from scratch. And still had the syncing problem. So, I wasn’t getting off easy.
In searching, I found some debugging stuff which I tried, as follows to turn on logging:
So, I ran the following:
cd C:\Program Files\Common Files\Apple\Apple Application Support\
defaults write com.apple.Outlook.client.exe ShouldLog YES
defaults write -globalDomain SyncServicesLogEverything YES
defaults write -globalDomain SyncServicesLogPersonalInfo YES
And this turned on a lot of tracing. The tracing helped me understand what was going on under the covers, But I am not sure I was getting enough of the information that I needed to really zero in on the bad record.
Now, I will pause and provide some observation of my specific Sync.
An iTunes Sync on a Windows machine when using Microsoft Office and Internet Explorer is selected on the INFO tab of the page for the device.
Selections include Contacts, Calendars, Bookmarks and Notes.
One of the programs involved with Outlook Synchronization is: com.apple.Outlook.client.exe
The program is called when Outlook data needs to be accessed, and is used for contacts, calendar and notes when those items are paired between the iDevice and Outlook. Bookmarks are usually paired with the browser, for example IE.
During the sync operation, each of these are sync’d separately, that is why if you follow the sync actions, iTunes will reflecting what is being synced at the moment, for example “syncing contacts”.
When syncing the calendar, and iTunes is running a slow sync, it reads the Outlook calendar using the com.apple.Outlook.client.exe and does processing of the recursion and time zone information.
For example, for recurrence:
[5484 @ Tue Jul 01 10:30:59 2014] [YSLog com.apple.Outlook.client.exe] Setting recurrence data <04300430 0d200200 000000ae 06000c00 00000000 00000400 00002120 0000e703 00000000 00000000 00000000 0000a0e7 980cc016 d10c0630 00000830 00000000 0000a005 00000000 00000000 00000000>
[5484 @ Tue Jul 01 10:30:59 2014] [YSLog com.apple.Outlook.client.exe] 0 recurrence exceptions
[5484 @ Tue Jul 01 10:30:59 2014] [YSLog com.apple.Outlook.client.exe] Reading the Extended Exception Info (i.e. Unicode data)
[5484 @ Tue Jul 01 10:30:59 2014] [YSLog com.apple.Outlook.client.exe] Done making compatible recurrence
For example, for timezone:
[5484 @ Tue Jul 01 10:30:43 2014] [YSLog com.apple.Outlook.client.exe] Could not create a time zone from outlook name, tried using name (GMT-05:00) Eastern Time (US & Canada)
Then the calendar entries are pushed, for example:
ca965dbc4717d9488fafc9266f1f829304082700 =     {
        "all
day" = 1;
        calendar
=         (
            ca965dbc4717d9488fafc9266f1f829382800000
"com.apple.outlook.freebusy" = Free;
"com.apple.syncservices.RecordEntityName" = "com.apple.calendars.Event";
        "end date" = "2020-05-11 12:00:00 +0000";
        location = "United States";
        "start date" = "2020-05-10 12:00:00 +0000";
        summary = "Mother's Day";
So, my SYNC fails, and I crash and burn with:
[5484 @ Tue Jul 01 10:41:22 2014] [_ISDVLog com.apple.Outlook.client.exe] SyncServices assertion failure (nil != strUTF8) in [(null) (null)], SDLogging.m:641 could not obtain UTF-8 flavor of formatted string
[5484 @ Tue Jul 01 10:41:23 2014] [YSLog com.apple.Outlook.client.exe] objcMain caught an exception:
name
NSInternalInconsistencyException
reason     : [(null)
(null)]: could not obtain UTF-8 flavor of formatted string
user info : (null)
call stack : (
Now I’m back. So, during the extract and push of the outlook calendar entries, iTunes is building formatted strings. Now, Unicode is usually 16 bit (2 characters) Unicode, sometimes called double byte code. UTF-8 is single byte, so realize you can’t squeeze 16 bits into a 8 bit byte. However, you could if the Unicode string only contained characters that were valid for the UTF-8 character set. My interpretation of the error message above was that somewhere a formatted character string contained a “non-UTF-8” character and raised the assertion. Now, my issue with the excessive detailing from the logs was that – at least with the logging parameters I had turned on – I couldn’t figure out which calendar entry caused the exception to be thrown.
First instinct was that the last calendar entry in the trace was the culprit, so I deleted that calendar entry, ran again, the sync went up to the previous entry, and threw the exception. This gives me two theories: Either the sync was processing the next entry – which wasn’t printed in the trace yet – and failed, or the sync was going back to previous records – like reviewing the buffer. In either case, the trace wasn’t helping and it was all theories.
Now what? What has everyone been saying? Issues with recurrence. And in the trace, as you see above as an example, “0 recurrence exceptions”, “reading the extended exception info (i.e. Unicode data)”.
Now, I have no clue what that means. My initial guess was that recurrence exceptions (I had non-zeros on some) was an error. But further research I realized what it could mean was that these were situations where there were recurrence exceptions. What is a recurrence exception? Suppose I want to schedule a meeting on the 4th day of the month, for every month of the year. Well, except maybe July 4th, because it is a holiday and the office is closed. I would send the meeting invite, and then a cancellation for the July 4th. (I hear there is no simple way to do this). I now have an exception because I broke the recurrence chain. Other forms of exceptions is if I keep changing the location, or the body of the invite – e.g. every month I update the agenda, but only for one recurrence, not the entire series.
So, keep in mind, that if the issue is conversion to a UTF-8 character, and it is failing, then uninstall/reinstall of anything is not going to help if the real issue at hand is the data in Outlook and is not a coding or configuration issue. Now, sometimes it is an issue, but you need to see why the syncserver tasks are failing, and may fail due to other reasons including other data issues.
So, what did I do? Well IO have 15K calendar entries, which, was taking an hour or two to slow sync (I call it a slow dance) and I was,spending days (maybe a couple of weeks) trying to fix this – and frustration was on the high end.
I removed some of my older recurrences, and changed others from never expire to like 25 maximum occurrences. No idea which one worked, or even if it was a coincidence. However, the UTF-8 error went away, and then I moved to the next issue.
Now, before we get there, with outlook 2007 finding recurrences is not difficult. Go into the calendar, and select appointment or list view (Outlook 2013 list view works ok). You can then sort on the recurrence column and see which (if any) items gave a recurrence pattern. Now maybe someone can figure out specific BAD calendar items that are throwing the exception to give us a better idea of what to look for and then report it so we can do further research.
Now, once we can get the issue out of the way, stop iTunes from throwing an exception, we are not 100% done yet. By this time what is in Outlook and on the iDevice is out of sync. We need to get that message to popup asking us if we want to merge the data between the iDevice and Outlook. This can be important if you don’t want to lose data. My issue is that with iTunes 11.2.2 for some reason won’t do it, i.e. when I select “reset sync history” it doesn’t work. At that point I was forced to rename my iTunesprefs, the syncserver folder, and a few other folders. In this case, for Windows 7 and later, the folders in “Apple Computer” of both the local and roaming paths, and I had to cancel running tasks that had those folders open. One way or another, you want the iTunes message asking if you want to merge the folders.
What can you do to help?
Report success or failures using the information above
Report if you are getting the same UTF-8 message, or if you are seeing other exceptions
Report specific cases of calendar entries that you find that you have isolated to be throwing an exception
Report any other logging/tracing parameters that you may find. It looks like you can turn on “ShouldLog” using the defaults.exe command for other tasks that iTunes runs.
This syncing issue has been going on for years, under different iTunes versions, there has to be something going on and an easier way to troubleshoot this problem. I wish I had the time, but right now I fixed the problem I had and was able to resync my Outlook with my two iPads and iPhone.
The only issue I have left at the moment is the message “the ipad xxx cannot be synced. An unknown error occurred (-54). – despite this error message, I am syncing, but the message is distracting and annoying.

Yes - both have time zone support and are set to London/GMT
The most recent of these aberrations was not even crossing a DST change - just a simple recurring event (which I've manually changed to single events by copy/paste).
I just tried a new one which goes back 1 hr 27 Oct - when UK clocks go back. As it's a dummy apt I'll leave it and see if if goes back to the correct time on 27 Oct! In the meantime, I can't afford for my appts to get screwed up so will continue to do them manually!
Thanks for your input.

Iphone to Outlook Calendar sync issue

My Iphone receives new posts from Outlook Calendar when in sync, but Outlook is not receiving new calendar entries from my Iphone when it is synched
Thanks

How about putting together the information about this nasty bug at a single place in this forum?
I recommend this thread: http://discussions.apple.com/thread.jspa?threadID=2213281&tstart=0
Please add your additional information in this thread!

Outlook calendar sync takes hours

The synchronizing of my iphone 5 with the outlook calendar takes many hours, although I have limited the number of days to 3. How can this be improved???

H-D.R wrote:
The synchronizing of my iphone 5 with the outlook calendar takes many hours, although I have limited the number of days to 3. How can this be improved???
I'm responding to Outlook calendar rather than iCloud calendar.
First, let me say this is not normal; calendar sync should take a few seconds.
Are you syncing via USB to your computer, via WiFi to your computer, or through a Microsoft Exchange server?
If you are using WiFi try USB.
If you have a problem on USB also you probably have corrupt entries in the Outlook calendar, or you have a very long history in the Outlook PST. To correct corruption Export the Outlook calendar to CSV (I think the export is on the File menu in Outlook), then import the CSV back to Outlook. This will remove corrupt data records.

Outlook Calendar Sync with 9850

Can I sync my 9850 with Outlook Calendar? I keep getting an "Error was encountered while syncing zero," and then it freezes up.

Hi and Welcome to the Community!
I find no KB in the public database that exactly matches the error you reported...perhaps your search may be more lucky:
http://btsc.webapps.blackberry.com/btsc/microsites/microsite.do
Failing anything useful there, I suggest this thread:
http://supportforums.blackberry.com/t5/Desktop-Software-for-PC/Cleanly-quot-Starting-Over-quot-with-...
It starts with a process for cleanly starting over, and there is some discussion, and there is also a post (15) with links to older Desktop Software versions, if those are needed. Note that this is not, by any means, guaranteed to work...but it has worked for many to resolve issues they are having.
Good luck!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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Outlook calendar sync problem

I have a BB8310 that has given me great service for over a year. Two days ago the calender stopped synchronizing with the Outlook calendar. When syncing the device, the address list, task list, memo pad all sync perfectly. The calendar does not sync at all. Any suggestions?
Solved!
Go to Solution.

Lybrandf wrote:
After all else failed, I took note that your mentioning of the facebook conflict. I decided to delete the facebook program on my BB altogether to see if that would clear up the issue. After deleting the facebook program and re-syncing the calendar only, the sync for the calendar worked fine. Just a lucky guess. Must be an issue between the facebook program and Outlook. Since having my calendar was more important that having the mobile facebook, deleting it wasn't a concern for me.
Hi,
I sure hope you can come back, you don't have to lose Facebook.
You obviously must have an email associated calendar on the device, which I was trying to establish.
You can set the Facebook calendar to update your email associated calendar and sync all events.
I will send you a PM as well.
Thanks,
Bifocals
Click Accept as Solution for posts that have solved your issue(s)!
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Outlook Calendar Sync Issue "Microsoft Office Outlook Offline Folders"

I am experiencing an issue synchronizing my Outlook Calendar with my iPhone. I am using the latest version of Itunes (7.6.2.9).
To reproduce:
1) Sync Outlook calendar with Iphone.
In Outlook, the following error displays:
"Microsoft Office Outlook Offline Folders"
"The file C:\Documents and Settings\<name>\Local Settings\Application Data\microsoft\outlook\outlook.ost is in use and could not be accessed. Close any application that is using the file, and then try again."
At this point, in order to view any mail or calendar entries, I am required to reboot my computer and relaunch Outlook. I had to disable synchronization with the iphone.
I followed the troubleshooting Calendars hints from the Support site, and I clicked "Reset Sync History." This seems to have temporarily fixed the problem, but I am not confident I won't receive the error again.
Is there a permanent fix for this?

This may be more than a temporary fix, so I would wait and cross that bridge if and when the same error message turns up.

Office outlook Calendar Sync

I have a 20GB colour click wheel IPod purchased late 2004.
Windows is XP with SP2 installed and updated regularly.
ITunes is the latest edition.
Microsoft Office is 2003 edition.
Problem is that I am trying to sync my Microsoft Office Outlook calendar with my IPod. However, despite ITunes stating that it is updating my calendar it does not. At the end of the automatic sync my song and photo library are correct, but my calendar remains empty.

This may be more than a temporary fix, so I would wait and cross that bridge if and when the same error message turns up.

Multiple Outlook Calendars - sync to Torch 9800

Hi there,
I'm posting to see if I can find a way to sync multiple outlook calendars with my blackberry. I work in a medical clinic, and everyone has their own calendars which list patients' appointments (set by the admin on her computer). Everyone else has an iPhone, and I have stubbornly refused to switch (I like my blackberry, and I like the security it gives).
Right now, I have set blackberry desktop software to one-way sync the clinic calendar to mine (only my clinic appointments). If I set more than that, it all merges into one calendar. However, my iPhone-toting-coworkers sync it all, then can select any clinician on their phone, and see that person's calendar. Very handy if you get stuck at the hospital and need to see who has room in their schedule to cover for you.
I'm envious.
Surely, I think to myself, BlackBerry must be capable of this. I mean, it's BlackBerry. Master of all things communication and calendaring! Surely my phone can do that! So if anyone can help me view my colleagues calendars on my BB, I'd really appreciate it.
Thanks!

Hey minumant
You can only sync the top calendar from your E7 whereas the other two could be modified or deleted and the latter can't be modified or deleted.
Feel free to include more topics again in the future.
I hope this answer your question.
Best regards
Carl
If this post answers your question, you can help others by clicking the green accepted solution' button.
Please ask your questions to the main board and not to my mailbox. Thank you.

Desktop Sync Software Error: "The Operation terminated unexpectedly" During Outlook Calendar Sync

My system is a standalone Dell PC running WinXP Pro SP3, Outlook 2003 SP3, and BB Desktop Software 6.1.0.36 (latest update). Device is a Bold 9900. Problem is with Blackberry Desktop synchronization of my Outlook Calendar; all other Organizer functions sync fine to Outlook 2003 if the Calendar is left un-sync'ed. When Calendar sync is checked to Outlook, either alone or with the rest of the Organizer functions, sync seems to progress to a point and "sees" device (Bold 9900) and Outlook Calendars, sees all the calendar events (2518 at present in the Bold, 2444 in Outlook) and sees additions/deletions and changes. It even gets as far as requesting verification of the changes required to sync. When process to update proceeds, the device calendar is polled once more, then the error message "The Operation terminated unexpectedly" appears, process stops, and Desktop Software becomes "hung". Sometimes Outlook also hangs. This occurs in both a "two-way sync" and a "one-way sync" (device over-writes Outlook).
Solutions on BB Support pages have been tried (deleted and replaced mapi32.dll file etc.) but most solutions offered appear to relate to later Outlook versions (2007 & 2010) and don't relate to Outlook 2003. I have also deleted the IntelliSync folder in the Research in Motion folder and re-initiated sync configuration to no avail. I especially like BB's coment on their Support page KB15735 (although it doesn;t mention Outlook 2003, nor Desktop Software 6.0):
This is a previously reported issue that has been escalated internally to our development team. No resolution time frame is currently available.
I previously used IntelliSync for a Palm 515 (and older Palm PDA's) on this PC with no problems. Older versions of IntelliSync and Palm software were all removed before BB Desktop Software installation. Also had tried un-installing Blackberry Desktop program and re-installing latest version.
The same Bold 9900 works fine syncing with my Win7 Pro 64 bit laptop running Outlook 2007 for all sync functions. Am I destined to upgrade my old desktop to Outlook 2007 or is there another fix?
TIA,
Keith

In my desparation to keeping trying different avenues, I tried uninstalling the DM again but reinstalled version 4.3.0.15 (Aug 15 '07) instead of the more recent versions (had previously tried both 4.5 and 4.6 with the same errors messages received).
My first attempt to synch my Outlook Calendar with v.4.3 didn't work either but for some reason, it does work now. Go figure? I'm just going to cross my fingers & hope this older version will continue to work.

BAD: Outlook Calendar items are removed as they occur!

I canceled my ME.COM account because it didn't work at all. The syncing affected my calendar and it looks like it tweaked something in iTunes.
When I sync - it looks like iTunes decides to remove events from my calendar in Outlook 2007. This is *TOTALLY UNNACEPTIBLE*! If I sync several times a day (which I do) - my calendar entries that have passed dissapear!
THIS WILL NEVER WORK for business. I am very dissapointed in the way iTunes works - I can't remove apps etc.
This will drive me back to a blackberry if I am not able to get support from Apple. I hope they are listening.
I need to sync bi-directionally and trust that the middleware won't destroy my data! This is not the case - I can no longer trust that ANYTHING coming from the iPhone will not destroy my Outlook calendar!
Perhaps this is how Apple wants to ensure I switch to a Mac! Sorry for the rant - but I have tried unsuccessfully to get ANY support...

Haven't seen this exact issue, but as part of a "best practices" document we prepared for users, we've told them NOT to update or accept appointments from any mobile device ( including IOS devices), just to do it from the Outlook client. Microsoft has also published a couple of best practices documents which you should look at if you haven't. Also, recurring meetings are a huge issue; for example, the MS best practices is only to create recurring appointments that won't change much, if at all...if there is a recurring meeting that changes frequently, it's better to schedule multiple individual instances of it than one recurring appointment.

Bad outlook calendar sync

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