Article ID: 2600234 - View products that this article applies to.
Not sure what release of Office 365 you're using? Go to the following Microsoft website:
Am I using Office 365 after the service upgrade?
When you use the light version of Microsoft Outlook Web App (OWA) to reply to an email message from an email account that you connected to Microsoft Office 365 pre-upgrade, you receive the following error message:
Additionally, the From field isn't present when you compose a new message or reply to a message.
You don’t have the permissions required to send messages from this mailbox.
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To resolve this issue, click to clear the Use the blind and low vision experience check box in OWA. To do this, follow these steps.
Note Before you follow these steps, make sure that you're using a supported web browser. For more info about the system requirements for Office 365, go to one of the following Microsoft websites, depending on which version of Office 365 your organization is using:
This occurs because the light version of Outlook Web App isn't supported when you reply to a message from a connected account. When you reply to a message from the connected account by using the light version of OWA, OWA tries to send as the default Office 365 pre-upgrade email address.
If the Always Show From option is selected in the message options or from the Exchange Control Panel mail settings, the From field is displayed when you compose a new message or reply to a message from a connected account. However, the From field isn't displayed when you use OWA in the light version regardless of this setting.
The light version of OWA is optimized to support users who are blind or have low vision and supports older web browsers. For more info about the light version of OWA, go to the following Microsoft website:
Outlook Web App Light
Still need help? Go to the Office 365 Community
Article ID: 2600234 - Last Review: September 6, 2013 - Revision: 6.0
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