Hi, Grffster.
If both accounts are Exchange mailboxes, then you need to configure the non-default account to allow the default account to send as instead of send on behalf of.
http://articles.techrepubl
Main Topics
Browse All TopicsI have two email accounts which I need to be able to send emails from in outlook 2003. I have a default one, and set up another mailbox for my non-default email address within my outlook so I can view incoming mail to either account. Problem is, when I want to send email from my non-default email address (change From address to non-default), it appears as from "default on behalf of non-default". Is there a way that, when I change the From to be my non-default address, that Iit appears to the recipient that it's come from the non-default address please?
This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.
Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.
If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.
Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.
Access the answers to your technology questions today.
30-day free trial. Register in 60 seconds.
Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Try it out and discover for yourself.
30-day free trial. Register in 60 seconds.
Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.
Hi, Grffster.
If both accounts are Exchange mailboxes, then you need to configure the non-default account to allow the default account to send as instead of send on behalf of.
http://articles.techrepubl
Business Accounts
Answer for Membership
by: sgsm81Posted on 2009-10-30 at 06:22:27ID: 25702645
Ah - Send As Permissions
Granting 'Send As' rights to an Exchange 2003 user
1. Run Active Directory Users and Computers and select the View menu and select Advanced Features.
2. Select the User object that will be Send on Behalf of
3. Right-click the object and select Properties.
4. Under Security Tab -> Click Advanced, click Add and type the username that you want to grant Send As permissions to.
5. Click Check Names to make sure you have the name right and then click OK.
6. In the Permission Entry dialog, select "This object only" in the "Apply to" dropdown, and then check "Allow" under "Send As" in the Permissions list. Make sure no other permissions are being explicitly granted.
7. Click OK to all to close the dialogs boxes.