exchange2010 OWA无法更改密码问题

刚架设完成的exchange2010 OWA能登陆，但是无法修改密码，点击修改密码就错误，提示账户无法验证。有没有exchange2010高手能解释下原因啊错误提示：RequestUrl: https://mail.hhmm.com:443/owa/forms/basic/BasicOptions.aspx?ae=Options&t=ChangePasswordUser host address: 172.16.16.9User: XXEX Address: ⼀o=HH MM⼀ou=Exchange Administrative Group (FYDIBOHF23SPDLT)⼀cn=Recipients⼀cn=user40c8e5d8SMTP Address: XX@hhmm.comOWA version: 14.0.639.21Mailbox server: HM-Exchange-01.hhmm.comExceptionException type: Microsoft.Exchange.Clients.Owa.Core.OwaIdentityExceptionException message: Failed to retrieve user name