You enable federation, public instant messaging (IM) connectivity, and remote user access for specific users to control the methods that users can use to communicate with external users.

The following procedure covers how to configure individual users for federation, public IM connectivity, and remote access. You can also configure a group of users by right-clicking Usersor the organizational unit (OU) containing the user accounts, and then clicking Configure Communications Users.
If you are running Windows Server 2008, you must use a server with the Active Directory Domain Services (AD DS) role installed to do this procedure. For details, see Active Directory Domain Services at .

To configure individual users to communicate with external users

  1. Log on as a member of the RTCUniversalServerAdmins group to an Enterprise Edition server or a server that is a member of an Active Directory domain and that has the Office Communications Server 2007 R2 administrative tools installed.

  2. Open the Active Directory Users and Computerssnap-in: Click Start, click All Programs, click Administrative Tools, and then click Active Directory Users and Computers.

  3. In the console tree, expand the domain, then click the Userscontainer or the other OU that contains the user account for which you want to enable federation, public IM connectivity, or remote user access, right-click the user account name, and then click Properties.

  4. On the Communicationstab, next to Additional options, click Configure.

  5. In User Options, under Federation, do the following:

    • To enable the user account for federation, select the Enable Federationcheck box.

    • To enable user account for remote access, select the Enable remote user accesscheck box.

    • To enable the user account for public IM connectivity, select the Enable public IM connectivitycheck box.

  6. Click OK, and then click OKagain.