Search with more than two double-byte character does not return any match from Email Quarantine search.
We are seeing this issue when searching with Japanese character but it is suspected on other double-byte characters.
If the subject is "未承諾広告テスト", you can search with "広告" ,but cannot get results with "承諾広告" or "テスト".
Symantec is aware of this issue and will update this article when a solution becomes available.
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