Article ID: 2679269 - View products that this article applies to.
Consider the following two users in a Microsoft Office 365 environment, User A and User B. You use the Add-RecipientPermission Windows PowerShell cmdlet to grant Send As permission to User A for User B's mailbox. Then, you use the Get-RecipientPermission cmdlet to confirm that the permission was applied.
However, when User A enters User B's address in the From box of a new email message and tries to send that message, user A gets a nondelivery report (NDR) message that states that he or she does not have sufficient permissions. These symptoms don't occur in Microsoft Outlook Web App. User A can successfully send email messages after user A enters user B's address in the From box of an email message in Outlook Web App.
This issue may occur if the address in the From box was automatically populated by using outdated, locally cached information when User A typed User B's address. This outdated information may be used if changes to the Offline Address Book were not yet propagated to Outlook.
To resolve this issue, follow these steps:
For more information about how to troubleshoot the Offline Address Book in Office 365, see the following Microsoft Knowledge Base article:
(http://support.microsoft.com/kb/2666477/ )How to troubleshoot the Outlook Offline Address Book in Office 365
Still need help? Go to the Office 365 Community