我想让最终用户可以查看pop配置，按照微软的步奏
使用命令行管理程序以允许 POP3 和 IMAP4 用户在 Outlook Web App 中查看其传入 POP3 和 IMAP4 设置Set-PopSettings -ExternalConnectionSettings {Dublin01.Contoso.com:995:SSL}
但是我在设置外部传入连接的时候Set-PopSettings -Settings 报错
[PS] C:\Windows\system32>set-PopSettings -ExternalConnectionSettings {mail.xxxx.com:995:SSL}
安装了 ExternalConnectionSettings 服务器角色时，邮箱角色: 邮箱服务 属性是只读的。
+ CategoryInfo : InvalidArgument: (:) [Set-PopSettings]，ExInvalidArgumentForServerRoleException
+ FullyQualifiedErrorId : [Server=EXCHANGE-MBX01,RequestId=f068a3f6-7775-468b-a13a-43d4572ef7f4,TimeStamp=2016/1/2
7 4:45:43] [FailureCategory=Cmdlet-ExInvalidArgumentForServerRoleException] A26D6A8D,Microsoft.Exchange.Management
.Tasks.SetPop3Configuration
+ PSComputerName : exchange-cas01.xxxx.com
后台服务已经全开，set-PopSettings | fl如图
[PS] C:\Windows\system32>get-popsettings |fl
RunspaceId : 61f94c45-0e81-4f30-9025-8585a6493c76
Name : 1
ProtocolName : POP3
MaxCommandSize : 512
MessageRetrievalSortOrder : Ascending
UnencryptedOrTLSBindings : {[::]:110, 0.0.0.0:110}
SSLBindings : {[::]:995, 0.0.0.0:995}
InternalConnectionSettings : {Exchange-MBX01.xxxx.com:995:SSL, Exchange-MBX01.xxxx.com:110:TLS}
ExternalConnectionSettings : {}
X509CertificateName : exchange-mbx01
Banner : The Microsoft Exchange POP3 service is ready.
LoginType : SecureLogin
AuthenticatedConnectionTimeout : 00:30:00
PreAuthenticatedConnectionTimeout : 00:01:00
MaxConnections : 2147483647
MaxConnectionFromSingleIP : 2147483647