Can Outlook 2007 calendars, contacts, etc on a Windows 7 64 bit computer be transfered to Outlook 2007 Windows 7 32 bit computer?

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This has come up because Apple mobileme chat says that mobile me doesn't work with 64 bit OS. Since the most current data is on the 64bit OS computer looking for a way to transfer the Outlook data.

Russ Valentine

Answered here daily. The file you need is your Personal Folders file (*.pst) It's where all the mail, calendar, contacts etc are stored.

Take a look at these pages for info on Outlook data backup or transfer:
Moving Outlook to a New Computer

Note that some of the information on the Microsoft page is outdated and contains errors, particularly when applied to Outlook 2003, 2007 or 2010. Specifically:
1. Ignore any advice to copy your PST file to Outlook's default location to connect it to your profile. Doing so will often corrupt your Outlook profile. Copy it anywhere BUT the default location and then open it within your Outlook profile.
2. Ignore any advice that tells you to use export or import to transfer an entire Outlook data file. That has never been sound advice, but the process has become too deeply flawed to be trusted.

Russ Valentine


Apparently I got the wrong information from the mobileme chat. Whether the OS is 64 bits or 32 bits does not matter. Office 2007 is only 32 bit application. So there should be no trouble transferring 32 bits. Maybe it is a different story moving from Outlook 2010 64 bit to 32 bit.

Let me ask the question I should have asked. What is your recommendation for removing duplicate entries in Outlook 2007?


Looks like my last post never made it.

The reason I thought PST might be different is data size the OS works on is different whether one uses 64bits or 32 bits. Apparently you are implying the PST would be the same whether Office 2010 64 bits or Office 2010 32 bits.

In this case since Outlook 2007 was involved, these is only 32 bits involved so there should not have been a problem doing the transfer. Mobile Me was also involved and that requires a 32 bits Outlook. Since both Mobile Me and iTunes was involved the data may be ending up in the wrong calendar etc.

Do you have any recommendations on which Outlook duplication removal software?

Russ Valentine

Not really. I haven't had to try any. I always trust Sperry software, FWIW.Russ Valentine


The Sperry software only mentioned emails; whereas, I was dealing with contact and calendar duplication. I decided to see what was on the CNET site and came up with Outlook Duplicate Remover that was available on both web sites. The cost was $20. The program did remove most duplication. The program could not handle recurring events and I manually deleted those entries.

I am going to close. The last question about the duplications should have been a separate thread but since you were answering this one, I asked.

The correct answer to the original question was my response. However, you did answer the following on question and I will try to mark more than one answer. You also gave additional Outlook links.
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