When you rename a user, the user's GroupWise user ID (mailbox ID) changes but the user remains in the same post office. All of the user's associations remain unchanged. For example, the user retains ownership of any documents and resources while other users who had proxy rights to the user's mailbox retain proxy right.
Make sure the user has exited GroupWise and GroupWise Notify.
Make sure the domain's MTA and post office's POA are running.
In the GroupWise View, right-click the User object > click Rename to display the GroupWise Rename dialog box.
Enter the GroupWise user ID.
Click OK to rename the user.
The user's new information is immediately replicated to each post office throughout your system so that the system address book contains the user's updated address. Any user who selects the renamed user from the system address book will be able to successfully send messages to the renamed user.
However, some users might have the user's old address (GroupWise user ID) in their Address Book's Frequent Contacts List. In this case, if the sender types the renamed user's name in the To field instead of selecting it from the system address book, GroupWise uses the old address stored in the Frequent Contacts List instead of the new address in the system address book. This will result in the message being undeliverable. The POA automatically resolves this issue when it performs its nightly user upkeep (see Performing Nightly User Upkeep). During the nightly user upkeep process, the POA ensures that all addresses in a user's Frequent Contacts List are valid addresses in the system address book.
If you want to ensure that messages sent to the user's old address are delivered even before the POA cleans up the Frequent Contacts List, you can create a nickname using the old GroupWise user ID. For information about creating a nickname, see Creating a Nickname for a User.