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You cannot install Outlook more than once, but Outlook does have a feature that supports multiple account configurations.

I use Outlook 2002/XP for personal email rather than Outlook Express. I would like to install a separate (additional) copy of Outlook with its own folders & contacts to use for business only. Is this possible?


But don't despair. Outlook has a feature designed to do exactly what you want.

This is a perfect use of Outlook mail profiles.

Go to Control Panel, Mail, Show Profiles. Each profile can be configured with different email accounts and different storage folders. In addition, you can have Outlook prompt you for which profile to use when it starts up.

I use multiple profiles on my laptop. When I'm at home I use a profile that includes all my email accounts. When I'm on the road I use a different profile that only checks a couple of critical accounts. When I'm traveling with my wife I use yet a third profile that includes my wife's email account as well.

Article C2230 - November 23, 2004 « »

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Leo Leo A. Notenboom has been playing with computers since he was required to take a programming class in 1976. An 18 year career as a programmer at Microsoft soon followed. After "retiring" in 2001, Leo started Ask Leo! in 2003 as a place for answers to common computer and technical questions. More about Leo.

Not what you needed?

March 24, 2005 2:58 PM

Can I install my own MS Office 2003 in a computer that already has MS 2003 (owned by work)in there a way to do this and will it override it? (Wonder if I am asking for the moon???!!).

March 24, 2005 5:26 PM

No. You'll overwrite the prior installation.

Andrew Murray
April 2, 2006 8:16 AM

Hi Leo,

I just switched over to Outlook 2003 from Outlook Express.

In the example above, you are using different profiles, similar to the Outlook Express concept of identities.

My question is if you set up multiple profiles in Outlook 2003 (which I have figured out how to do) can you have them share the same calendar/tasks etc?


April 2, 2006 4:10 PM

Sure. As long as each profile references the same ".pst", that's where the calendar and tasks are stored. I do it all the time :-).

Chuck Bennett
July 28, 2006 7:20 PM

How do I install Outlook over Outlook Express and keep my folders, address book and message rules?


Leo Notenboom
July 29, 2006 9:45 AM

Install Outlook, and then use it's import function to import your OE mail.

Brad Hayashi
September 24, 2006 10:10 PM

How do I reference the same calendar pst when using two profiles?

Claudio Parra
March 6, 2007 6:36 AM

Hi Leo,

I use Outlook 2003 and I am wondering if it is possible to send emails from two differents account created under the same profile. There seems to be always one account selected by default and the only way I have found to use the other account to send emails is to change the "by default" account in option. żAny suggestion?

Than you.

Leo Notenboom
March 6, 2007 8:38 AM

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That's this article:

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Radoslaw Janiec
September 7, 2007 3:11 AM

Hi Leo,

I have a following problem. I'm using two separate e-mail accounts in MS Outlook. Right now when i Send/Receive the messages from both accounts automaticaly land in default folders - Inbox, Sent Itmes etc. Now, is it possible to run two separate windows and folder trees for each account in one instance of MS Outlook, so that the messages don't "merge" in just one inbox/sent items and so as it happens now? Thanks for any advice

Leo A. Notenboom
September 10, 2007 3:06 PM

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No and yes.

No: There's no way to have Outlook do that automatically for you.

Yes: you can set up a folder tree manually and use "Message Rules" (see the
Rules item in the Tools menu) to automtically move messages to folders you
designate as they arrive.


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John F. Scholten
September 22, 2008 7:53 AM

Similar to above, but, I think what is required is two "pst" files, lets call them home and business.
The calendars should be able to be opened side by side, so one can drag personal stuff (birthdays, reminders, etc..) onto the business copy. Also some business stuff would be required on the personal copy.
So, is it possible:
1: TWO copies of "pst"?
2: If yes, how user friendly would they both be?

It can work. The biggest issue is that Outlook will always consider one of the two PST's "primary", and deliver mail to it and the like. But otherwise it can work well.
- Leo

October 18, 2011 2:24 PM

My wife and I have two (separate domain) Microsoft Exchange email accounts. I see how to have two profiles but is it possible for those profiles to be two separate Microsoft Exchange accounts? If so should they each be using the same .pst file?
I dont seem to be able to make it happen...

January 17, 2012 7:29 AM

Thanks! You're the best!

adam g
October 5, 2012 8:19 AM

I have a business email account-exchange server through outlook. I get my email on phone and desktop at home and everything syncs perfect. No I have another totally separate business up and running and want to do the same thing. I want an exchange account through my email provider and want everything to sync on my phone and my computer. How does that work. I would like to have 2 totally separate widgets/icons for company A and company B. Currently have my new business email on Thunderbird but dont like it.
How is all this done. thanks

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