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are u getting NDR internally while replying to old emails.<br />
IF yes,add x.500 address to the users manually.
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are u getting NDR internally while replying to old emails.
IF yes,add x.500 address to the users manually.

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No, I am just curious to know if these values change in any way. I have not started the migration yet. 
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No, I am just curious to know if these values change in any way. I have not started the migration yet.

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Just an addition to it=&gt;<br />
Ideally,it should change,but normally it doesnot change.
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Just an addition to it=>
Ideally,it should change,but normally it doesnot change.

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Does E2K3 to E2K7 migration change a mailbox's LegacyExchangeDN or Alias?
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Does E2K3 to E2K7 migration change a mailbox's LegacyExchangeDN or Alias?

Does E2K3 to E2K7 migration change a mailbox's LegacyExchangeDN and/or Alias

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.