Hi I've now created a user to hold the e-mail address, and then forward e-mails into the Public Folder. This works fine, but it's now quite the solution I was hoping for. If someone should have an idea to my problem, please let me know. best regards Stephan

Hello, If your public folder is mail enabled, you can use public folder management console or PowerShell commands to check that: <1> You can check send as permission on public folder with public folder management console <2> You can run this command to check the send as permission: Get-Adpermission -identity publicfolder -User username If you need to check the send on behalf of setting on public folder, you can use this command: Get-MailPublicFolder -identity publicfolder| select Name,GrantSendOnBehalfTo Thanks, EvanEvan Liu TechNet Community Support

Hi Evan Thanks for your replay, and I had already checked the rights through the Public Folder Management Console, and now also through EMS, and all users are granted 'Send As' and 'GrantSendOnBehalfTo' rights. But I still get the message: You do not have permission to send on behalf of the specified user. I have now also tried to send from Outlook 2003 SP3 and Outlook 2007 SP3, but with same result. Any other ideas what I can try next? Thanks Stephan

If you only need to work with send as, it is no need to configure "GrantSendOnBehalfTo". Use command to confirm you have send as permission on public folder, then recreate Outlook profile to have a try. Thanks, Evan Evan Liu TechNet Community Support

Hi I've now tried to remove the 'GrantSendOnBehalfTo' permissions, and checked that only 'Send As' is still active. Then I waited for at least one hour, to be sure the rights have been replicated. I've deleted the user profile on our terminal server so I get a clean Windows profile. I reconfigured Outlook 2010, but still I get the same error. Please let the good ideas comming. Thanks Stephan

Hi I got a problem with Exchange 2007 (verision 8.3 (Build 83.6))and Mail-Enabled Public Folder. I have some users who should be able to send from this public folder, but they get the following permission error all the time: You do not have permission to send on behalf of the specified user. The users has Owner rights on the public folder. Through Exchange Management Console (EMC), I've open the 'Public Folder Management Console' from the Toolbox, browsed to the Public Folder and chosen 'Properties'. Here I've set the Replication to 'Run every hour', changed the primary SMTP E-Mail address, and added the users in 'Send on behalf'. This didn't work. Afterwards I tried to add the users in 'Manage Send As Permission' from the 'Public Folder Management Console', but still no luck. Then I thought that the PowerShell/Exchange Management Shell (EMS) commands may be a better wawy, so I removed the users from the above mentioned places, and run the following two commands: Add-ADPermission "Mail-enabled Test" -User "domain\Test" -Extendedrights "Send As" When that did not work, I tried with: Set-MailPublicFolder "Mail-enabled Test" -GrantSendOnBehalfTo "Test" I can see that the rights looks OK in EMC, but the users can still not send from the mailbox. Users have Outlook 2010 SP1 installed, and in the 'From' field they type the primary SMTP address I've set for the Public Folder. The folder is located as followed: Default Public Folders\Customer\Mail-enabled Test Is there a way to check the 'Send As/Send on behalf' rights through EMS? Does anyone have any suggestion what the problem might be, or any idea what to try next? Thanks Stephan M. Sberkrb