Answer Posted / dhanraj

I dont know about up gradation from lower version to higher version, but i think this link may help you.
http://www.msexchange.org/articles_tutorials/exchange-server-2007/migration-deployment/moving-mdaemon-exchange-server-2003-2007-part1.html

it contains many parts, carefully read it and try to follow

What is the autodiscover service?

954

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how do I find an smtp mail address in active directory if active directory users and computers tells me it is in use when I try to create a new user

1087

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What is the function of mailbox trport submission service?

964

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Explain what is the stm file?

1004

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What is availability service

1060

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How do I activate session timeouts for owa users?

1013

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Can I use exchange 2003s owa to access a mailbox on an exchange 5.5 or exchange 2000 server?

896

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Will an in place upgrade from exchange 2000 remove the m: drive?

955

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What is the difference between "receive as" and "send as"?

969

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Why do I have to disable link state routing?

970

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Explain the change in outlook client connection behaviour when compared with exchange 2010?

964

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When will exchange 2003 sp1 be available?

935

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How do I limit the maximum amount of messages the smtp queue can hold?

952

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I have created more than one address list. Which list will users see for their gal?

979

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Explain the difference between exchange 2003 and windows 2003?

884

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