User cannot search mailbox

Outlook/Exchange 2007 SP2

A user cannot carry out searches within his mailbox, there are no items returned. He definately has the items there.

I've heard that we can reset the search index for the user's mailbox on his server.

1. Does anyone know a safe way to do this and how does this work exactly?
2. Will this affect other users?
3. Will this cause a load on the server?
4. Should this be done out of hours?
5. Will this have a negative effect on the user (can it be done whilst he's working)?
6. Would this problem affect both Outlook and OWA?
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Mark DamenERP System ManagerCommented:

The search function is being performed by Outlook, and so can safely be done during production working hours and without affecting anybody else.

This is a MS link detailing how to rebuild the cache.  It describes your issue in the article.


if the user is NOT using cached mode in outlook and also having problems in owa, i'd rebuild the index on the server.  you'll want to do this off hours.

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