I'd attempt to use a Binary file editor (hexedit) and replace string of info with other info in the EDB and STM files. (Take the database offline first.) To target specific messages, you could search using the Hex editor for test strings in items you have specifically created for the purpose. -----Original Message----- From: Manjeet Singh [mailto:Manjeet.Singh@xxxxxxxxxxx] Sent: 26 September 2005 07:13 Subject: Data corruption in exchange[Scanned] All, I am looking for different ways - How to corrupt 1. Mailbox Store 2. Public Store 3. A single Mailbox 4. Public Folder 5. A single message in the mailbox We have created an application for Exchange and I want to test my application with by manually corrupting the message/mailbox/mailbox store/public store. Thanks, Manjeet ------------------------------------------------------------ The information contained in or attached to this email is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are not authorised to and must not disclose, copy, distribute, or retain this message or any part of it. It may contain information which is confidential and/or covered by legal professional or other privilege (or other rules or laws with similar effect in jurisdictions outside England and Wales). The views expressed in this email are not necessarily the views of Centrica plc, and the company, its directors, officers or employees make no representation or accept any liability for its accuracy or completeness unless expressly stated to the contrary.