First create, mail-enable and grant appropriate permissions to the public folder.
To grant a user the Send As permissions for a public folder, follow these steps:
1. |
Start Exchange System Manager, and then locate the public folder. |
2. |
Right-click the public folder, and then click Properties. |
3. |
Click the Permissions tab, and then click Directory rights. |
4. |
Add the user who you want to grant Send As permissions to, and then click the user in the Name list. |
5. |
In the Allow column of the Permissions list, click to select the Send As check box. |
6. |
Click Apply, and then click OK. |
7. |
Right-click the public folder that you created, and then click Properties. |
8. |
Under Exchange Advanced, click to clear the hide from Exchange address lists check box. |
9. |
Type a name for the alias in the simple display name box. |
10. |
Click OK. |
Then rebuild the OAB and download to clients.