X500 name used as From for some users sending

Some users see there X500 name "/O=Company/OU=FIRST ADMINISTRATIVE GROUP/CN=RECIPIENTS/CN=USER"  in the from line of there emails.  Any ideas to fix this for the few users it is occurring with would be great.

Thanks!
LP-ITAsked:
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Raheman M. AbdulSenior Infrastructure Support Analyst & Systems DeveloperCommented:
Changing the properties of the contacts that encountered this problem.
Remove the name in the cache. (Try this article: http://support.microsoft.com/kb/287623)
Hope this helps:
https://www.simple-talk.com/sysadmin/exchange/exchange-e-mail-addresses-and-the-outlook-address-cache/
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LP-ITAuthor Commented:
The issue was on the Clients as soon as i reset there outlook profiles it fixed the issue.
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LP-ITAuthor Commented:
Issue resolved

If the above doesnt fix the issue permanently delete the OAB folder and download the address book again from Send Receive in outlook.
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