Removing x400 addresses from default e-mail policy

Hey Everyone,

In the past we have had issues with with bounce backs on accounts that were re-created for users. I believe the issue is due to the users' x400 addresses. We are looking to remove the x400 from our default email policy to avoid this issue in the future. If I am understanding it correctly, by removing the x400 address, an account that is created in the future will not receive a bounce back because it is only looking at the SMTP address and not looking for a x400 address?

By removing the x400 address from the default policy and applying it, will that remove the x400 address for all accounts that have one or will it keep them and not add an x400 address for future accounts that are created?

Also, we are running Exchange 2010. Recently upgraded from exchange 2003 about 6 months ago.

Any help is appreciated.

Thanks!
post_universityAsked:
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ExchangeOnTheRocksConnect With a Mentor Commented:
Autocomplete feature is based on the .nk2 files and looks for legaqcyDN values. It should not look for X400 addresses and hence there should not be any bounce backs.
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ExchangeOnTheRocksCommented:
Yes, you can safely remove the X400 addresses given that you do not have any other emailing systems apart from Exchange in your setup.
Removing it from the default email policy and applying them will prevent new users from being stamped in Exchnage 2010. Old accounts will still have the X400 address for which you can run the above mentioned script.
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post_universityAuthor Commented:
After changing the default email policy and running the script to remove all the x400 addresses will we have a bunch of bounce backs since all of our users use autocomplete?

Will their autocomplete file look for that x400 address that is now missing and bounce back?
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als315Connect With a Mentor Commented:
Autocomplete should not search for x400 addresses, but you can test it: delete one x400 address and try autocomplete
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