IPhone 4 won't sync calendar with Outlook 2010 and Windows 7

I have iPhone 4 and have noticed my Outlook 2010 (32 bit) calendar won't sync in either direction with my iPhone. I run Windows 7 (64 bit version 6.1 Home Premium). ITunes (10.4.1.10 version) sees my device and I even checked the serial number match. Entries in my calendar on the phone don't appear in Outlook and entries in Outlook don't appear on the phone. I have double checked all the settings and they all seem correct, so what is happening here?

Did you try the troublshooting mentioned here? Troubleshooting iPhone and iPod touch contact and calendar syncing via USB on Windows
Start with resetting the sync history:
Reset Sync History
If you find that some of your data syncs to your device but you see an unexpected number of changes or modifications, you may need to reset your sync history. This causes iTunes to prompt to Merge or Replace information on the device when you next attempt to sync your information. To reset your Sync History:
Open iTunes.
From the Edit menu, choose Preferences.
Click the Devices tab.
Click the Reset Sync History button.

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My iPad won't sync calendar with Outlook Exchange but my iPhone will

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My iphone syncs perfectly with Outlook Exchange. However, my iPad does not sync properly. On the iPad, only a few appointments show up. If I try to refresh the sync, the few appointments on the iPad disappear while I am watching.
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Any suggestions? I have tried rebooting but that hasn't helped.

Have you tried deleting the Exchange account, and adding it again fresh? I had similar problems and this fixed it for me.

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Please visit the following link from apple.com/support to sync the 2010 calendar.
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Hi - can't see this exact problem elsewhere hence the post...
I have iPhone 3G syncing with OWA from Exchange 2003 just fine with mail and contacts. Calendar is totally blank though. If I create a new appointment on iPhone then it shows up in Exchange - great! If I do it the other way round then I get nothing on iPhone - unless I invite myself in which case it does! But then if I delete the email invitation then the entry disappears. I could live with that (just about) but not but being able to sync my calendar history is a big problem for me.
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Hi man, I got the same problem with my iPhone, but it has been solved..
First, You need the Outlook 2003 or 2007 only, if you have a earlier version of this it isn't work.
Second, You sould need to create a new PST file whit the Outlook Version 2003 or 2007, the file format must be on Unicode Format, no Outlook (97-2000) format, with this file format the import of calendar doesn't gonna be work.
Third, You now have a PST whit Outlook 2003 or 2007 Version, you need to manually put your events on the calendar, Why? Cause if you just move it on the new calendar it gonna create and old instance of the event not a new instance, That's why iTunes doesn´t sync the calendar.
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HELP !! My ipad mini and iphone 5 just stopped syncing calendar with outlook 2007 calendar.

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I am using an iPhone 5, iOS 8.1.1, an older MacPro with OS 10.7.5 and iTunes 12.0.1.26
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Hi Yankeerebel,
I'm sorry to hear you are having issues after a recent update. If you continue to have calendar sycing issues between your Mac and your iPhone, you may find the troubleshooting steps outlined in the following article helpful:
Sync Services: Advanced troubleshooting for contact and calendar syncing - Apple Support
Regards,
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Syncing calendar with Outlook 2010

I have just recently started having this problem. I create appt in either iPad (2) or iPhone (4S) which sync to each other but which do not sync to my Outlook (PC). I have only one calendar to synch, and have chosen to sync all. Does not do it either wirelessly or wired. It does sync from my Outlook (PC) to my devices but not the other way around. This is a fairly new issue for me. It used to work fine. Have I inadvertently changed a setting somewhere? It all looks the same to me.
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iPad in the Enterprise
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I am having trouble with my groups in my contacts in Outlook 2010 transferring to my Iphone 5. I have resynced my history, but that has not helped my problem. I have several groups that I email on a regular basis for work related issues. These groups have up to 125 people. The people in the groups change, and so I will move them to an inactive group on my Outlook 2010, but they will not move from the current group on my Iphone. HELP!

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Seems this an Exchange-Outlook 2011/2010 mix scenario. Seems Admin even cannot to see the categories changed through OWA, I think the categories have still not updated to mailbox from the Executive user's Outlook 2011. Does it happen when the user and
admin share their calendar with categories in one platform, I mean Outlook in Windows in both side or using OWA?
For the Office for Mac question, please post it to the following forum.
http://answers.microsoft.com/en-us/mac
Tony Chen
TechNet Community Support

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IPhone 4 won't sync calendar with Outlook 2010 and Windows 7

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