客户端版本：Outlook App For IOS/Android(已更新到最新版本)
服务器版本：Exchange2016 CU13
网络：所有客户端一律使用内网
问题描述：
IOS和Android手机自带的邮件客户端都可以使用Exchange模式连接邮件服务器，并正常收发邮件，但是使用App Store/Android Store下载的Outlook App无法正常连接，提示登录失败，可以确认邮件地址、服务器、域、用户名、密码等所有选项填写无误。
服务器端检测：
[PS] >Get-ActiveSyncVirtualDirectory -Server Exchange01 | fl Identity,*auth*,*url*
Identity : EXCHANGE01\Microsoft-Server-ActiveSync (Default Web Site)
MobileClientCertificateAuthorityURL :
BasicAuthEnabled : True
WindowsAuthEnabled : False
ClientCertAuth : Ignore
InternalAuthenticationMethods : {}
ExternalAuthenticationMethods : {}
MobileClientCertificateAuthorityURL :
InternalUrl : https://exchange01.xxxx.com/Microsoft-Server-ActiveSync
ExternalUrl : https://dag.xxxx.com/Microsoft-Server-ActiveSync
[PS] >Get-ServerComponentState Exchange01
Server Component State
------ --------- -----
Exchange01.xxxx.com ServerWideOffline Active
Exchange01.xxxx.com HubTransport Active
Exchange01.xxxx.com FrontendTransport Active
Exchange01.xxxx.com Monitoring Active
Exchange01.xxxx.com RecoveryActionsEnabled Active
Exchange01.xxxx.com AutoDiscoverProxy Active
Exchange01.xxxx.com ActiveSyncProxy Active
Exchange01.xxxx.com EcpProxy Active
Exchange01.xxxx.com EwsProxy Active
Exchange01.xxxx.com ImapProxy Active
Exchange01.xxxx.com OabProxy Active
Exchange01.xxxx.com OwaProxy Active
Exchange01.xxxx.com PopProxy Active
Exchange01.xxxx.com PushNotificationsProxy Active
Exchange01.xxxx.com RpsProxy Active
Exchange01.xxxx.com RwsProxy Active
Exchange01.xxxx.com RpcProxy Active
Exchange01.xxxx.com UMCallRouter Active
Exchange01.xxxx.com XropProxy Active
Exchange01.xxxx.com HttpProxyAvailabilityGroup Active
Exchange01.xxxx.com ForwardSyncDaemon Inactive
Exchange01.xxxx.com ProvisioningRps Inactive
Exchange01.xxxx.com MapiProxy Active
Exchange01.xxxx.com EdgeTransport Active
Exchange01.xxxx.com HighAvailability Active
Exchange01.xxxx.com SharedCache Active
Exchange01.xxxx.com MailboxDeliveryProxy Active
Exchange01.xxxx.com RoutingUpdates Active
Exchange01.xxxx.com RestProxy Active
Exchange01.xxxx.com DefaultProxy Active
Exchange01.xxxx.com Lsass Active
Exchange01.xxxx.com RoutingService Active
Exchange01.xxxx.com E4EProxy Active
Exchange01.xxxx.com CafeLAMv2 Active
Exchange01.xxxx.com LogExportProvider Active
请问如何解决，服务器配置缺失还是其他原因？请提供排查思路，排查项目，不吝赐教~！
