You can modify the exchange off-line address book for bulk user accounts.
First, select the desired offline address book and then apply the same to desired list of users.
Select the AD Mgmt tab - -> User Management
Click the Exchange Off-line Address Book link available under Exchange Attributes. This opens the Modify exchange off-line address book for user accounts dialog.
From the drop down menu, select the Exchange Off-line Address Book.
4. 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.