Renamed AD Account - OWA still shows old Account in Change Password Option

An account in AD was renamed and all other info related to it that can be found in UI (including mailbox and Username).  The user is already logging in to OWA and computer using the new username but when he wants to change his password via OWA,  the username info was still showing the old username, there he is unable to change his password in that route. Need help in this. Thanks.
pordsAsked:
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Chris HudsonCloud Security ArchitectCommented:
The UserName change never be notified to OWA.
You should manually change and configure mail setting from OWA
If you need the old mail,please export and import after creating the new user profile
pordsAuthor Commented:
Contacted MS and they suggested disabling caching registry entry on our Exchange server and restarted the server. After the restart, issue is resolved.

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pordsAuthor Commented:
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