If you archive communications from federated users, you should enable the archiving disclaimer notification to warn partners that their messages are being archived.
To notify federated users that their communications are being logged
On an Edge Server, open Computer Management: Click Start, point to Administrative Tools, and then click Computer Management.
In the console tree, expand Services and Applications, right-click Office Communications Server 2007 R2, and then click Properties.
On the Access Methodstab, verify that the Federate with other domainscheck box is selected, and then select the Enable archiving disclaimer notification to federated userscheck box.