(Which is correct, because he wants to "send as", and therefor doesn't have "Send on behalf" rights.) Hope someone could help me with this problem? I can't figure out a problem a user of mine has: He's trying to send an e-mail as another exchange user using the "Send as"-option. The user has "Send as"-permissions, but when he chooses to send "From" the mail-account, he gets an error saying that he doesn't have "Send on behalf" rights?The cached mailbox and OAB are updated periodically from the Exchange Server computer.The user can select Cached Exchange Mode or Online Mode during account setup or by changing the account settings.
The offline address book contains the properties of a user, such as email addresses, that Microsoft Outlook requires to send an email message and display information about the sender.
It also insulates users from network latency and connectivity issues while they are using Outlook.
If your company hosts its email system using Microsoft Exchange, you have the benefit of a centrally-managed address book called the Global Address List, or GAL.
This reduces the number of times the Outlook window might become unresponsive and the number unnecessary connections to the Microsoft Windows Server Active Directory.
This feature requires you to use a Microsoft Exchange Server 2000, Exchange Server 2003, or Exchange Server 2007 account in Cached Exchange Mode.