If anyone else uses SCOM or other monitor that looks at Exchange Health, here are the commands to disable the Monitors that Extended Protection breaks for 120 days. (To give Microsoft some time to fix the issue.)
Add-GlobalMonitoringOverride -Identity "Outlook\OutlookRpcCtpMonitor" -ItemType Monitor -PropertyName Enabled -PropertyValue 0 -Duration 120.00:00:00
Add-GlobalMonitoringOverride -Identity "OutlookMapiHttp\OutlookMapiHttpCtpMonitor" -ItemType Monitor -PropertyName Enabled -PropertyValue 0 -Duration 120.00:00:00
Add-GlobalMonitoringOverride -Identity "Outlook.Protocol\OutlookRpcSelfTestMonitor" -ItemType Monitor -PropertyName Enabled -PropertyValue 0 -Duration 120.00:00:00
Add-GlobalMonitoringOverride -Identity "Compliance\ComplianceOutlookLogonToArchiveRpcCtpMonitor" -ItemType Monitor -PropertyName Enabled -PropertyValue 0 -Duration 120.00:00:00
Add-GlobalMonitoringOverride -Identity "Outlook.Protocol\OutlookRpcDeepTestMonitor" -ItemType Monitor -PropertyName Enabled -PropertyValue 0 -Duration 120.00:00:00
Add-GlobalMonitoringOverride -Identity "Compliance\ComplianceOutlookLogonToArchiveMapiHttpCtpMonitor" -ItemType Monitor -PropertyName Enabled -PropertyValue 0 -Duration 120.00:00:00