Consider the following scenario:
- You set the Outlook Web App default format to plain text in a Microsoft Exchange Server 2013 environment. For example, you run the following Windows PowerShell cmdlet in the environment:
Set-MailboxMessageConfiguration - Identity <username> -DefaultFormat PlainText
- You sign in to Outlook Web App by using Windows Internet Explorer 8.
- You create an email message in plain text, and then you type some text in the message body.
- You click another window. For example, you click a new tab in Internet Explorer 8, a notepad file, the desktop, and so on.
To work around this issue, use the HTML format as the Outlook Web App default format.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the Set-MailboxMessageConfiguration cmdlet, go to the following Microsoft website: