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Title
Error: The communication object cannot be used because it is in the Faulted state -
Description
QuickConnect Sync Server cannot sync Password changes from some Source Domain Controllers. The following details are logged:
The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state.
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Cause
TLS is enabled on the affected DCs. -
Resolution
QuickConnect Capture Agent WCF log shows the following details:
- System.ServiceModel.Security.SecurityNegotiationException: SOAP security negotiation failed. See inner exception for more details.- System.ComponentModel.Win32Exception (0x80004005): The client and server cannot communicate, because they do not possess a common algorithm
Removing the following reg keys from the affected Domain Controllers and restarting the QuickConnect agent fixed the issue:
'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0'
'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1'
'HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2'