Hi, I am trying to understand the structure of an edb file for exchange server 2003. So, far in my research i have understood that an edb file is logically divided into pages. The first two pages are file header. What i have failed to understand is the structure of a page. Can any body help me in this direction. Thanks, Jude

Check below detailed article to see how it is structured... Understanding Information Store Essentials (Part 2) http://www.messagingtalk.org/content/252.html Amit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com

Hi, Thanks for the very useful link. I used esentutl tool to dump a page 4. This is some of the data that i got :- TAG 0 cb: 16 ib: 0 offset: 28 - 37 flags: 0x0000 TAG 1 cb: 19 ib: 59 offset: 63 - 75 flags: 0x0000 TAG 2 cb: 19 ib: 40 offset: 50 - 62 flags: 0x0000 TAG 3 cb: 18 ib: 22 offset: 3e - 4f flags: 0x0000 TAG 4 cb: 19 ib: 422 offset: 1ce - 1e0 flags: 0x0000 TAG 5 cb: 14 ib: 78 offset: 76 - 83 flags: 0x0000 TAG 6 cb: 19 ib: 307 offset: 15b - 16d flags: 0x0000 TAG 7 cb: 19 ib: 455 offset: 1ef - 201 flags: 0x0000 TAG 8 cb: 19 ib: 667 offset: 2c3 - 2d5 flags: 0x0000 could you please explain me what these information mean. Does it mean the list of pages page 4 is pointing to in the b+ tree ? Thanks, Jude

Hey Jude, This information is nothumanreadable or understandable, only store engine caninterpretit so leave this to it... :) Or not sure if Microsoft ESE developers has any mechanism to understand this but at least not available for public.Amit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com