Sender name is different after migrating to target Exchange Mailbox.
Found out that the email address of the Sender in addresstranslation.tsv is incorrect.
Also see the below information from the wlog, the email address shows incorrect:
14:48:57 Migrating message:
14:48:57 Msg: (OF29F6F2D2:DB18E1F6-ON48257ECF:0018D312)
14:48:57 Folder: (Folders\Test Folder)
14:48:57 Subject: (This is a test email)
14:48:57 Sender: ("John Smith"
14:48:57 Date: (Fri Aug 08 18:45:51 2014)
14:48:57 Original message: notes:///48257ECF0018F475//29F6F2D2DB18E1F648257ECF0018D312
The issue can be resolved by doing the following:
After that, delete the affected emails from the target Exchange Mailbox before remigrating the mailbox.