- You are running Microsoft Outlook in online mode in an Exchange Server 2016 or Office 365 environment.
- The Preferred encoding for outgoing messages option in Outlook is set to Cyrillic KOI8-R (the default encoding setting for the Russian version of Outlook).
- You create a message that contains some Russian characters, and then you save it as a draft.
Configure the Outlook client to use UTF-8 for the Preferred encoding for outgoing messages option. To do this, follow these steps:
- In Outlook, select File > Option > Advanced.
- In the International options section, set the Preferred encoding for outgoing messages option to UTF-8.
- Before you do other settings, you should make sure that you specify the following Registry settings in Windows Registry Editor Version 5.00.
- There's a performance effect if this registry key is used. So, it should be configured for use only in environments where the functionality is required.
a) Action: "Create"
b) Hive: "HKEY_LOCAL_MACHINE\ "
c) Key path: SOFTWARE\Microsoft\ExchangeServer\v15\Storage\ContentConversion
d) Value name: AllowRestampCharsetOnInernetCPIDMismatch
e) Value type: REG_DWORD
f) Value data: 1
g) Base: Hexadecimal
In addition, you need to manually create the "Storage" key and its sub key "ContentConversion" if you can't find them under the key path.