In some situations you may need to override server defaults for specific clients. For example, if the majority of your IMAP4 clients can interpret HTML, you can set the server to provide message bodies in HTML by default. However, if a few clients using the IMAP4 server cannot interpret HTML, you can override the Multipurpose Internet Mail Extensions (MIME) encoding set on the server and provide plain text messages for those clients. Overriding server defaults at the user level allows you to support clients with different needs that access the same IMAP4 virtual server.
Note You can also create additional virtual servers on a single computer to provide administration for several messaging scenarios. This solution may be best suited for a large number of clients with varying needs.
To set per-user options:
Tip If Active Directory Users and Computers doesn't appear on the Administrative Tools menu, on the Start menu, click Run, type dsa.msc, and then click OK.
|MIME Encoding||MIME provides a way to describe a
message consisting of different parts. By definition, all IMAP4
clients are MIME-aware. Options include:
|Default character set||Exchange supports multilingual
messages using Windows code pages instead of Internet character
sets. Most languages have a one-to-one correspondence between the
character set and code page. If multiple character sets exist for
one code page, Exchange uses the character setting specified on the
Message Format tab.
Note Early MAPI clients, such as Outlook 97, do not allow the user to specify a character set. Character set conversion settings apply for these clients only.
|Use Microsoft Exchange Rich Text Format||If enabled, IMAP4 clients receive messages in Exchange Rich Text Format (RTF). Although all IMAP clients receive the information as an attachment, the attachment is opened and displayed as a normal message for IMAP clients that understand Exchange RTF. For IMAP clients that do not understand Exchange RTF, an attachment is displayed.|
|Include all public folders when a folder list is requested||By default, Exchange lists all public folders in response to the IMAP4 LIST ""* command. To improve performance for clients that have problems listing a large number of folders, list only the client's private folders.|
|Enable fast message retrieval||By default, Exchange calculates the exact size of a message. To increase the speed of message retrieval for clients that do not require exact message size reports, you can enable the server to approximate message sizes.|