This is normal behavior. Most Outlook user options are not specific to the
Outlook mail profile. Individual accounts have no plain text option.
If you log on as a different Windows user, however, you'll have settings
specific to Outlook for that user, separate from the settings for the
original user.
--
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers