#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found

Hi Experts,

When a certain user send an email to another internal email address, he always get the #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found. The full error message is below:

#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##

The person "user1@domain.com" is no longer at the company resulting in the error. How do I get rid of this email address from our Exchange 2007 server?
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MASEE Solution Guide - Technical Dept HeadCommented:
1st option is to delete that entry from outlook cache and add as a new entry. Outlook see that as a different user which is not existing.

2nd option is to convert the NDR to X500 and add it into the new mailbox.

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Also check the if the non existing user was not setup as delegate in outlook for anyother mailbox
jnsimexAuthor Commented:
Thanks Experts!
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