Hello community,
I'm facing an issue with a Dynamics 365 On premise Plugin where I'm getting a SecurityException related to System.Net.WebPermission. The exact error message is as follows:
Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: Unexpected exception from plug-in (Execute): Crm.Plugins.Outbound: System.Security.SecurityException: Request for the permission of type 'System.Net.WebPermission, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.Detail:
<OrganizationServiceFault xmlns:i="">www.w3.org/.../XMLSchema-instance" xmlns="">schemas.microsoft.com/.../Contracts">
<ActivityId>55b753a0-2e1c-4058-8d8f-5fce997c0c73</ActivityId>
<ErrorCode>-2147220956</ErrorCode>
<ErrorDetails xmlns:d2p1="">schemas.datacontract.org/.../System.Collections.Generic" />
<Message>Unexpected exception from plug-in (Execute): Crm.Plugins.Outbound: System.Security.SecurityException: Request for the permission of type 'System.Net.WebPermission, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.</Message>
<Timestamp>2023-05-18T07:50:09.8190886Z</Timestamp>
<ExceptionRetriable>false</ExceptionRetriable>
<ExceptionSource i:nil="true" />
<InnerFault i:nil="true" />
<OriginalException i:nil="true" />
<TraceText>
Error: System.Security.SecurityException: Request for the permission of type 'System.Net.WebPermission, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
at System.Security.CodeAccessPermission.Demand()
at System.Net.HttpWebRequest.CheckConnectPermission(Uri uri, Boolean needExecutionContext)
at System.Net.HttpWebRequest..ctor(Uri uri, ServicePoint servicePoint)
at System.Net.HttpRequestCreator.Create(Uri Uri)
at System.Net.WebRequest.Create(Uri requestUri, Boolean useUriBase)
The action that failed was:
Demand
The type of the first permission that failed was:
System.Net.WebPermission
The Zone of the assembly that failed was:
MyComputer
This issue occurs when the Plugin tries to make a web request. I have already checked the necessary permissions and tried also webClient but the problem persists (upgraded to dot net framework 4.6.1 also). Could anyone provide some suggestions on how to resolve this issue? Are there any specific CRM configuration settings or permissions that need to be adjusted?. Initially plugin was able to call the web api but now stopped working suddenly. tried Manifest.xml but no luck
Any help or insights would be greatly appreciated. Thank you in advance!"
