troubleshooting Question

Schannel error 70 on Exchange CAS and Mailbox servers

Avatar of akyuen
akyuen asked on
SecurityWindows Server 2008* Wireshark
4 Comments1 Solution7466 ViewsLast Modified:
I noticed that my Exchange CAS and mailbox servers (running Exchange 2010 on Windows server 2008 R2) are filled with Schannel Event ID: 36887 errors (The following fatal alert was received: 70).  I've read that these might be the cause of SSL errors; however, I've installed and run WireShark but don't see any SSL related errors.  In the event log, the errors occur consistently at equal intervals every minute.  Any ideas on what could be the cause of these errors? Here's a sample of one of the errors:

- System

  - Provider

   [ Name]  Schannel
   [ Guid]  {xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxxx}
   EventID 36887
   Version 0
   Level 2
   Task 0
   Opcode 0
   Keywords 0x8000000000000000
  - TimeCreated

   [ SystemTime]  2017-03-15T04:08:34.094792700Z
   EventRecordID 307600
  - Execution

   [ ProcessID]  736
   [ ThreadID]  788
   Channel System
  - Security

   [ UserID]  S-1-5-18

- EventData

  AlertDesc 70
Tom Cieslik
IT Superintendent
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