Sending any notification or email message in a Workflow activity fails with the error:
Specified method is not supported.
Active Roles verbose logging shows an error similar to the following:
System.NotSupportedException: Specified method is not supported. at ActiveRoles.Service.Server.ProcessRequest(RequestContext context) at ActiveRoles.Service.Workflow.ActivityNotifications.ComposeMailMessage(Nullable`1 mailCfgGuid, NotificationConfiguration notifCfg, TaskNotificationStatusRecord record, Operation operation, WorkflowTask task, String wiUrl)
1) Possible configuration issue with the workflow notification
2) Incompatible Change Auditor plugin present.
Delete the existing Notification Rule and then recreate and configure again.
Confirm in the Change Auditor release notes that the version present is compatible with the current Active Roles version. If not, remove, upgrade, and re-deploy the Change Auditor components.