我有一个配置了LDAP身份验证的Alfresco 5.0b实例。身份验证工作正常，用户可以登录并使用Alfresco，但他们的电子邮件值不会出现在Alfresco中，即使它存在于LDAP中。 LDAP服务器将电子邮件值存储在mail属性中。
ldap-authentication.properties文件如下所示：
ldap.authentication.active=true
ldap.authentication.allowGuestLogin=false
ldap.authentication.userNameFormat=
ldap.authentication.java.naming.factory.initial=com.sun.jndi.ldap.LdapCtxFactory
ldap.authentication.java.naming.provider.url=ldap://127.0.0.1:389
ldap.authentication.java.naming.security.authentication=simple
ldap.authentication.escapeCommasInBind=false
ldap.authentication.escapeCommasInUid=false
ldap.authentication.defaultAdministratorUserNames=
ldap.synchronization.active=false
ldap.synchronization.java.naming.security.authentication=simple
ldap.synchronization.java.naming.security.principal=cn\=admin,dc\=ldap,dc\=local
ldap.synchronization.java.naming.security.credentials=Password
ldap.synchronization.queryBatchSize=0
ldap.synchronization.attributeBatchSize=0
ldap.synchronization.groupQuery=(objectclass\=posixGroup)
ldap.synchronization.groupDifferentialQuery=(&(objectClass\=posixGroup)(!(modifyTimestamp<\={0})))
ldap.synchronization.personQuery=(&(objectclass\=inetOrgPerson)(memberOf=cn\=alfresco-users,ou\=groups,dc\=ldap,dc\=local))
ldap.synchronization.personDifferentialQuery=(&(objectclass\=inetOrgPerson)(!(modifyTimestamp<\={0})))
ldap.synchronization.groupSearchBase=ou\=groups,dc\=ldap,dc\=local
ldap.synchronization.userSearchBase=ou\=people,dc\=ldap,dc\=local
ldap.synchronization.modifyTimestampAttributeName=modifyTimestamp
ldap.synchronization.timestampFormat=yyyyMMddHHmmss'Z'
ldap.synchronization.userIdAttributeName=uid
ldap.synchronization.userFirstNameAttributeName=givenName
ldap.synchronization.userLastNameAttributeName=sn
ldap.synchronization.userEmailAttributeName=mail
ldap.synchronization.userOrganizationalIdAttributeName=o
ldap.synchronization.defaultHomeFolderProvider=largeHomeFolderProvider
ldap.synchronization.groupIdAttributeName=cn
ldap.synchronization.groupDisplayNameAttributeName=description
ldap.synchronization.groupType=posixGroup
ldap.synchronization.personType=inetOrgPerson
ldap.synchronization.groupMemberAttributeName=memberUid
ldap.synchronization.enableProgressEstimation=true
ldap.authentication.java.naming.read.timeout=0
userEmailAttributeName设置为mail，但似乎无效。如何修复Alfresco中的电子邮件值？