This article explains some important feature differences between Outlook Web App (OWA) Premium and Light versions running on Exchange 2010.
Outlook Web App (OWA) 2010 provides access to email and calendaring over the internet. Its Premium version is much more robust than its predecessor, Outlook Web Access 2007. With nearly all features of the Outlook 2010 client program, the Premium version may quickly become your preferred email access method.
In order to use OWA 2010 Premium, you must meet the following browser requirements:
If you use a Web browser that doesn't support the full set of features, Outlook Web App (OWA) will open in light version. The light version provides fewer features but is still highly usable.
Below is a feature matrix comparison between the Light and Premium versions. Green checks indicate the feature is available in that version; red x buttons mean the feature is not available.
|Accessibility for Blind and Low Vision Users||
|Notifications and Reminders|
|Weekly Calendar Views|
|Compose Messages by Using HTML||Only plain text
|Calendar Options||Limited to the following features:|
|* Show week numbers|
|* Set the first day of the week|
|* Select days of the week|
|* Set day start and end times|
|Arrange By||Limited to a subset of choices
|Resource Mailbox Management|
|Voice Mail Options|
|Share a calendar|
|Open a shared calendar|
|Monthly calendar views|
|Scroll between pages|
|Users can create and edit personal distribution lists|
|Users can create and edit server side rules|
|Web ready document viewing|
|Exchange Control Panel|
|Attach Message to a Message|