Assume that you're using Microsoft Outlook to either reply to a message or forward a message that's sent from one of the following environments:
Microsoft Exchange Server 2013
Microsoft Exchange Server 2010 Service Pack 1 (SP1) or Exchange Server 2010 Service Pack 2 (SP2)
Microsoft Exchange Online in Office 365
In this situation, Japanese double-byte character set (DBCS) characters that appear in any of the following fields of the message become corrupted:
The display name of the sender
The display name of the recipients
The subject of the message
The file name of an attachment
The message body
This issue occurs if the field contains single-byte Kana characters.
Note This issue also occurs in posted items in public folders.
This issue occurs because the value of the PR_INTERNET_CPID MAPI property of the message is stamped as 50222 by Exchange RPC Client Access service or Outlook Web App. Because of a restriction in Outlook, the code page 50222 characters are corrupted.
To resolve this issue, use one of the following methods, as appropriate for your situation.
In Exchange Server 2013
Use the Exchange Management Shell to change the value of the PreferredInternetCodePageForShiftJis parameter to 50220. To do this, follow these steps: