You can modify the delivery options for users, such as set the recipient limit, assign "send on behalf" permissions , and also configure the mail forwarding options from here.
First, configure the delivery options based on your requirement. Then , apply the configuration to desired list of users.
Select the AD Mgmt tab - -> User Management
Click the Delivery Options link available under Exchange Attributes. This opens the Modify Delivery Options of the Users dialog.
Select the desired users or enter the appropriate values for the following options:
Send on behalf: Select this option to grant permissions to users who can send mail on behalf of the mailbox owner. Add the users by clicking the Add icon.
Send As: Select this option and specify the users as whom the owner of this mailbox can send emails to other users or groups.
Recipient Limits: Select this option and specify the maximum recipients or choose the default limit.
Forwarding Address: Select this option and specify the user to whom the mails have to be forwarded. You can also choose to deliver mails to both the forwarded user and the mailbox owner.
You can now use one of the following options to list the contacts whose group attributes have to be modified
a) You can import the CSV file (sample CSV file) which contains the list of users. After importing the CSV file, from the drop down menu (on the right hand side), select the attribute based on which you want to display the user objects.
b) Use the Search option to find the users (Note: To list all the users, just click the Search button without typing anything in the Search box)
5. Now, use the check box to select the desired list of user (s) and then click Apply
The change summary and the status of the modification can be verified.
Roll over the mouse over the icon to see the attributes in the windows native UI.
Note: If you grant a user both "Send as" and Send on behalf of permissions, the "Send as" permission overrides the "Send on behalf of" permission.