Store.exe process uses almost 100 percent of CPU resources

Cause:
problem occurs because the index is not available when the Microsoft Exchange Information Store service tries to create an index-based view. It takes lots of CPU resource to create such views. Additionally, such views require lots of temporary table space. The space requirement causes the database to increase.

Resolution:
Apply update rollup 1 for exchange server 2007 service pack 1

Workaround :

• Move public folders to a server that is running Microsoft Exchange Server 2003.
• Turn off the Microsoft Search Service in Exchange Server 2007.
• Use an address list instead of sharing contacts in public folders.