An existing connection was forcibly closed by the remote host

The most likely cause for this is you might be using the old Report Authoring Extension which is not compatible for latest support for TLS 1.2 protocols that have been implemented with latest CRM SDK.

You can update Report Authoring Extension with latest one from here

https://www.microsoft.com/en-us/download/confirmation.aspx?id=56973

Dynamics 365 (online), version 9.0 Report Authoring Extension (with SQL Server Data Tools support)

If you might encounter such kind of error when programming then try to go through below blog - https://vjcity.blogspot.com/2018/04/microsoft-dynamic-crm-v90-and-tls-and.html

Here are some other links for Troubleshooting and learning:

·       Plugin in Dynamic 365 CRM

·       Connect to Dynamic 365 CRM from Console App using Azure Authentication

·       Could not load file or assembly 'System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies

·       Unable to Login to Dynamics CRMOrganizationWebProxyClient is null

·       Assembly 'Microsoft.Crm.Sdk.Proxy' with identity 'Microsoft.Crm.Sdk.Proxy, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' uses 'Microsoft.Xrm.Sdk, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' which has a higher version than referenced assembly 'Microsoft.Xrm.Sdk' with identity 'Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

·       Could not load file or assembly 'Microsoft.Xrm.Sdk, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference.

·       Could not load file or assembly 'Microsoft.Xrm.Sdk, Version=6.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies

Hope this Help!

Thanks.

Vipin Jaiswal

vipinjaiswal12@gmail.com