Hello, I am reviewing the list of Alerts coming when I am doing the patchuing of the Exchange Servers. Most of them could be prevented by putting the severs in Maintenance Mode but some of them remains.: - Forefront - Cluster - Nodes... Alert: A message has reached or exceeded the configured poison threshold. After the Microsoft Exchange Transport service restarted, the message was moved to the poison message queue. Alert: An error 1245 occurred while disabling rule on the public folder. The folder ID is in the data section of this event. Alert: An RPC request to the Microsoft Exchange Active Directory Topology service failed. Alert: Cluster resource group offline or partially online Alert: Dell OMSA System management data manager stopped Alert: Ending backup of the database - all data has not been read. Alert: Exchange 2007 Largest Delivery Queue Length Error Alert: Exchange 2007 MS Exchange Monitoring Service Alert Alert: Exchange 2007 Retry Mailbox Delivery Queue Length Error Alert: Exchange 2007 Test Active Sync Connectivity Alert Alert: Exchange 2007 Test Exchange Search Alert Alert: Exchange 2007 Test IMAP Connectivity Alert Alert: Exchange 2007 Test Local Mail Flow Alert Alert: Exchange 2007 Test Mapi Connectivty Alert Alert: Exchange 2007 Test OWA Connectivity Internal Alert Alert: Exchange 2007 Test POP3 Connectivity Alert Alert: Exchange 2007 Test Remote Mail Flow Alert Alert: Exchange ActiveSync has encountered repeated failures communicating with a Mailbox server. The process will be postponed. Alert: File Distribution Service: IO operation has failed. Current file synchronization operation is aborted. Alert: HP Insight Management Agents failed. Alert: Hub Servers In Retry Error Alert: Information Store Service Stopped Alert: Internet Information Services 2003 Web Server is Unavailable. Alert: Microsoft Windows Internet Information Services 2003 Application Pool is Unavailable. Alert: Microsoft Windows Internet Information Services 2003 Web Site is Unavailable. Alert: ScanRealtimeDisabledE Alert: ServicesForefrontMonitor StateMonitor Alert: ServicesForefrontService StateMonitor Alert: System.Health.EntityState Alert: The backup stopped because the database is terminating. Review the Application log for events that can help you determine the root cause of this event. Alert: The connection between the Client Access server and the Mailbox server failed. Alert: Transport Service Stopped Alert: UpdateFail Alert: UpdateFailGeneric Alert: WWW Publishing Service Stopped Alert: Cluster network is down Alert: Cluster Node is not online. Alert: Cluster Node is not online. Alert: Cluster resource failed Alert: Cluster resource group offline or partially online Alert: IIS 7 Web Server is unavailable Alert: IIS 7 Web Site is unavailable Alert: IIS 7 Web Site is unavailable What will be the best way to address this issue? (to be sure no alert is sent out for the desired period of time for the concerned Exchange Servers) Thanks, DomSystem Center Operations Manager 2007 / System Center Configuration Manager 2007 R2 / Forefront Client Security / Forefront Identity Manager