How to fix Schannel error 36874?

You may find this error in Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2,  Windows Server 2016, Exchange 2013, Exchange 2016

You will experience the connection issues in Outlook or in the 3rd party applications while connecting your Exchange server with the following message in the event log.

TLS 1.0 connection request was received from a remote client application, but none of the cipher suites supported by the client application are supported by the server. The TLS connection request has failed.

What is the cause? :

This may happen because the TLS encryption is not enabled on your server. It may cause an issue to connect applications via HTTPS and TLS encryption fail on the connections.

What is the Solution?

You will need to enable TLS encryption on your server. Please follow Accuweb > Enable TLS article to enable TLS 1.2 on your windows server. Once you are done with this, you should be able to connect the connection with HTTPS and TLS encryption.

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