(taken from my post i submitted here)
Background Info:
- I am using the latest version of Itunes, 11.0.3, and Outlook 2010.
- Iphone 4s using iOS 6.1.3
- I have been using 2 POP accounts and 1 IMAP Account.
- Recently, I have migrated my IMAP account to Office 365.
- To avoid having to re-do all the customization, I decided to simply 'add' an exchange-office 365 profile into my current DEFAULT OUTLOOK PROFILE where all my POP and IMAP accounts are found.
Situation:
All is well, until I realized, my default Outlook data file is now switched to the Exchange 2013/2010 OST file side where Office 365 account resides. Now I don't have any calendar or Contacts in that OST file. Therefore when Itunes launched and perform a sync, all my contacts and calendar items were..zapped.
Solution:
- Untick the sync in Itunes for Outlook. All my contacts and calendar on the phones will be deleted. Better that way since i don't want to end up with duplicates.Just proceed to REMOVE.
- Note that you need to manually record any new items you've just created on the phone ever since you realized that your contacts and calendars were missing on the phone.
- Do a sync and check the phone to see that all info are 'GONE'.
- Closed both outlook 2010 and itunes.
- Go to Control Panel > Mailbox (32-bit) > Click Show Profile
- I only had 1 profile, so choose the default profile (usually named OUTLOOK)
- Click Properties
- Click Data Files
- Make sure that the old PST file is ticked. Note that it should currently be the Exchange Office 365 OST file. When I choose my old PST file, it gave me a warning which i noted, and proceed.
- Note that emails for office 365 will still be delivered to the Office 365 OST file because in Accounts List, the default mail delivery folder (Properties > Accounts > Email Accounts > select the Office 365 acc > you'll see that the New messages will be delivered to the OST file.
- Proceed to apply, then close everything.
- IMPT: OPEN OUTLOOK FIRST, this will set the Outlook Data File configuration right with the PST file being the default instead of the Office 365 OST.
- After Outlook is opened, verify that Calendar and Contacts are there and well.
- Proceed to open Itunes right after that. It doesn't matter whether Outlook is opened or closed.
- Go to the Iphone - Info tab, then tick the sync with Outlook for both Calendar and Contacts...
Now you can breathe and relax.