Make sure that address book synchronization is set up and functioning successfully, as described in Section 2.0, GroupWise/Exchange Address Book Synchronization.
Create the new, dedicated Free/Busy service user in your GroupWise system, as described in GroupWise Authentication Credentials.
Create the new, dedicated Free/Busy service user in your Exchange system, as described in Exchange Authentication Credentials.
Make sure that the Free/Busy service users are exempt from password expiration rules.
Make sure that the Exchange server where you plan to install the GroupWise Free/Busy service meets the requirements listed in Section 3.2.2, Exchange System Requirements.
Continue with Installing the Free/Busy Service.