Alert: The following discovered partners are sending frequent invalid SIP requests to the Access Edge Server.
Management Pack Name: Microsoft Lync Server 2010 Management Pack
Management Pack Version: 4.0.7577.0
Rule or Monitor: Monitor
Rule or Monitor Name: Possible attack by Discovered Partners: traffic restricted
Rule or Monitor Notes: The alert description contains the list of partners which this issue is occurring for.
Issue: This alert is indicating different organizations that want to be federated with your organization but are currently not federated.
Resolution: There is an option to manually remove the errors which are discussed at: http://ocsguy.com/2011/04/20/a-few-words-on-federation/. Another option is to create an override to disable this alert if the organization does not care to federate with the organizations that are listed in the alert description.