RESOLVED: Metadata error in Outlook plugin after upgrading to v9.0

Recently I encountered a problem with one of our client who upgraded their CRM instance to v9. They were using the old Outlook plugin for D365 (heavy client). It was failing due to invalid metadata. The following was the error thrown by the system.

There is a problem communicating with the Microsoft Dynamics 365 server. The server might be unavailable. Try again later. If the problem persists, contact your system adminuistrator.

Metadata contains a reference that cannot be resolved: ‘https://crmorgname.api.crm.dynamics.com/XRMServices/2011/Organization.svc?wsdl&sdkversion=8.2’.    at System.ServiceModel.Description.MetadataExchangeClient.MetadataRetriever.Retrieve(TimeoutHelper timeoutHelper)
   at System.ServiceModel.Description.MetadataExchangeClient.ResolveNext(ResolveCallState resolveCallState)
   at System.ServiceModel.Description.MetadataExchangeClient.GetMetadata(MetadataRetriever retriever)
   at System.ServiceModel.Description.MetadataExchangeClient.GetMetadata(Uri address, MetadataExchangeClientMode mode)
   at Microsoft.Xrm.Sdk.Client.ServiceMetadataUtility.RetrieveServiceEndpointMetadata(Type contractType, Uri serviceUri, Boolean checkForSecondary)
   at Microsoft.Xrm.Sdk.Client.ServiceConfiguration`1..ctor(Uri serviceUri, Boolean checkForSecondary)
   at Microsoft.Xrm.Sdk.Client.OrganizationServiceConfiguration..ctor(Uri serviceUri, Boolean enableProxyTypes, Assembly assembly)
   at Microsoft.Xrm.Sdk.Client.ServiceConfigurationFactory.CreateConfiguration[TService](Uri serviceUri, Boolean enableProxyTypes, Assembly assembly)
   at Microsoft.Xrm.Sdk.Client.ServiceConfigurationFactory.CreateConfiguration[TService](Uri serviceUri)
   at Microsoft.Crm.Outlook.ClientAuth.ClientAuthProvidersFactory`1.DiscoverAuthUsingServiceMetadata(Uri endPoint, Uri webEndPoint)
   at Microsoft.Crm.Outlook.ClientAuth.ClientAuthProvidersFactory`1.GetAuthProviderForDeployment(Uri endPoint, Uri webEndPoint)
   at Microsoft.Crm.Application.Outlook.Config.DeploymentsInfo`1.GetAuthenticatedProvider(OrganizationDetail orgDetail, Control parentWindow)
   at Microsoft.Crm.Application.Outlook.Config.ServerForm.LoadDataToServerInfo()
   at Microsoft.Crm.Application.Outlook.Config.ServerForm.<InitializeBackgroundWorkers>b__3(Object sender, DoWorkEventArgs e)
   at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
   at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)

To resolve this issue, we need to update the Outlook plugin. The link to the updated outlook plugin is here and the following KB article specifies more details.

Hope this helps.