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RojoshoFlag for United States of America

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Customer with VERY large .ost file - Can this be deleted or reduced?

Hello et al,

I am on site working a system with several issues (Bad sectors on the HDD, slow performance with Outlook, to name a few).  One of the issues I notice is that this customer has a 6.2GB .ost file.  Based on my research, this large .ost file could be contributing to the slow Outlook performance and I would to remove, delete or reduce it, but wanted to check with the Pro's first to make sure I am on the right path.

I checked with the customer and he does not use the 'Work Offline' feature and really does not need the "Cached Exchange Mode" in an Exchange Server 2003 environment; he does not have or use a laptop to 'remote' into the Exchange Server - All of his work is done in the office.  One exception, he does use the web base process to read his emails, but that appears to be done via the Exchange Server.

So, my question....
?What is the best way to deal with this?
?Can this .ost file be deleted?
?If not, how can it be reduced (Found a lot of why this should be done, but no actually steps on 'how to do' this)?
?Suggestions for best practices when using or managing the 'Work Offline' feature?

Thank you for what you all do....

Rojosho
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dmeeren
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Hello Fellow TroubleShooters,

I must apologize for being MIA for so long  :(  Wow, time flies when you are chin deep with allegators.

First, thank you to both Dmeeren and Expone for their input - very good information and I am scheduled to go on site to follow up with this problem.

Some addtional information which may help us make the final decision.

 - The customer does not use normally use the 'Offline' feature of Outlook.
I suspsect that these .OST files were created by accident when the cusomter was scrambling around trying to recover from an Exchange Server or Outlook outage.  

All of my investigation (The the comments from Dmeeren and Expone) seem to point to the fact that these .OST files can be deleted.  If the a user accidently goes into 'Offline Mode', all that will happen is a performace drop as a new .OST file is created - Does that about sum things up?

If I can get this confirmed, then I will go out and delete these files and move on.

Again, THANK YOU for your inputs and information,

Rojosho
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ASKER

Excellent job gentlemen.

Rojosho