Skype for Business Server 2015 – 准备Active Directory失败，错误：5

我试图按照本指南将Skype for Business 2015部署到testing实验室。 我已经执行了准备Active Directory的所有先决条件操作。 当我运行任务以从“部署向导”准备AD架构时，它会失败，并在日志中显示以下错误消息。

Error: Upload C:\Program Files\Skype for Business Server 2015\Deployment\Setup\ExternalSchema.ldf failed. The exit code is "5". ▼ Details └ Type: DeploymentException └ ▼ Stack Trace └ at Microsoft.Rtc.Management.Deployment.LcSchema.ThrowLDIFDE_ErrorCodeDeploymentException(String path, Int32 exitCode) at Microsoft.Rtc.Management.Deployment.LcSchema.UploadSchema(String path) at Microsoft.Rtc.Management.Deployment.LcSchema.PrepareSchema(String ldf, SchemaType schemaType) at Microsoft.Rtc.Management.Deployment.Tasks.ServerSchemaPrepareTask.Action() 

我可以确认我正在以Schema Admins组的成员身份运行。