Symptoms
"18931578","2016-08-03 15:58:20","Error","MessageBus","61012","ConnectionError","ExchangeWebServicesOrigin","61012 Exception from message source {email}: System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.
at System.Web.Services.Protocols.WebClientProtocol.EndSend(IAsyncResult asyncResult, Objectand internalAsyncState, Streamand responseStream)
at System.Web.Services.Protocols.SoapHttpClientProtocol.InvokeAsyncCallback(IAsyncResult result)","","","pfund-K2:C:Program Files (x86)K2 blackpearlHost ServerBin","18931578","e58d8ea2ffdd45eb9caca78a546c7cc9",""
"18931729","2016-08-03 15:58:43","Error","General","0","ErrorMessage","SourceCode.Workflow.Common.EWS: ","0 Mail send failure: EWS URL is not valid. Verify the connection strings are correct. Exception: The request failed. The request was aborted: Could not create SSL/TLS secure channel.","anonymous","0.0.0.0","pfund-K2:C:Program Files (x86)K2 blackpearlHost ServerBin","18931729","d11a1ab14cbc468495cfdbc889f85fe6",""
"18931730","2016-08-03 15:58:43","Error","General","0","ErrorMessage","SourceCode.Workflow.Common.EWS: ","0 Autodiscover not available and mail cannot be sent. Reconfigure K2 server with valid Exchange settings.","anonymous","0.0.0.0","pfund-K2:C:Program Files (x86)K2 blackpearlHost ServerBin","18931730","ee08662cba35453680fc51f2a16721f5",""
"18931731","2016-08-03 15:58:43","Error","General","28083","ExtenderExecuteError","ProcessInstance.HandleException","28083 ServerEvent: SourceCode.Workflow.Common.EWS: Autodiscover not available and mail cannot be sent. Reconfigure K2 server with valid Exchange settings.
InnerException: SourceCode.Workflow.Common.EWS: Autodiscover not available and mail cannot be sent. Reconfigure K2 server with valid Exchange settings.","","","pfund-K2:C:Program Files (x86)K2 blackpearlHost ServerBin","18931731","acd76c3dee2d4c2c82c812f4c43df81f",""
"18931770","2016-08-03 15:58:50","Error","MessageBus","61012","ConnectionError","ExchangeWebServicesOrigin","61012 Exception from message source {email}: System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.
at System.Web.Services.Protocols.WebClientProtocol.EndSend(IAsyncResult asyncResult, Objectand internalAsyncState, Streamand responseStream)
at System.Web.Services.Protocols.SoapHttpClientProtocol.InvokeAsyncCallback(IAsyncResult result)","","","pfund-K2:C:Program Files (x86)K2 blackpearlHost ServerBin","18931770","17a2c4dce14c40c2b687ebf5f966caf4",""
"18931775","2016-08-03 15:59:20","Error","MessageBus","61012","ConnectionError","ExchangeWebServicesOrigin","61012 Exception from message source {email}: System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.
at System.Web.Services.Protocols.WebClientProtocol.EndSend(IAsyncResult asyncResult, Objectand internalAsyncState, Streamand responseStream)
at System.Web.Services.Protocols.SoapHttpClientProtocol.InvokeAsyncCallback(IAsyncResult result)","","","pfund-K2:C:Program Files (x86)K2 blackpearlHost ServerBin","18931775","26316395ad9e40c1b730fa116aa2220d",""
"18931776","2016-08-03 15:59:21","Error","IdentityService","64005","ResolvingException","IdentityService.ProviderCacheIdentity:GroupProvider.GetGroup","64005 Failed to resolve 'SP:BMP ManagementBMP Management Owners': An unexpected failure was encountered when contacting SharePoint to get information from the group provider BMP Management: Unable to connect to the remote server.","anonymous","0.0.0.0","pfund-K2:C:Program Files (x86)K2 blackpearlHost ServerBin","18931776","b619ecf161fe4cb3aba383fe4cf462ae",""
"18931778","2016-08-03 15:59:50","Error","MessageBus","61012","ConnectionError","ExchangeWebServicesOrigin","61012 Exception from message source {Email}: System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.
at System.Web.Services.Protocols.WebClientProtocol.EndSend(IAsyncResult asyncResult, Objectand internalAsyncState, Streamand responseStream)
at System.Web.Services.Protocols.SoapHttpClientProtocol.InvokeAsyncCallback(IAsyncResult result)","","","pfund-K2:C:Program Files (x86)K2 blackpearlHost ServerBin","18931778","e1d5100fa61c4f8ea2122da880a8443b",""
Diagnoses
the problem from exchange server NLB,
Resolution
The respected customer closed the ticket after he fixed it internally the last response from him was:
"
the issue has been fixed, the problem from exchange server NLB,
"
