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Mastering Microsoft Exchange Server 2003 phần 10

Hình 14.1: Sử dụng trang tài sản chung của hộp thoại Properties cho dịch vụ Microsoft Exchange IMAP4 để cho phép các máy tính dịch vụ và quản lý kết nối mạng liên tục lo lắng về thời gian hoạt động hệ thống, và vì lý do tốt. Công việc của họ phụ thuộc vào hệ thống đáng tin cậy, có sẵn. | Exchange Server 2003 Figure 19.3 Configuring Exchange ActiveSync at the user level using the Exchange Features page of a user s dialog box Outlook Mobile Access OMA presents a simple text interface for accessing Exchange server-based e-mail calendars contacts and tasks. As you ll see in the next section Wireless Networking Clients the text on OMA screens includes URLs to make navigating around your Exchange mailbox fairly easy. OMA was designed for telephones with small screens and at least basic web browser capabilities. OMA can generate differently formatted output for different devices. It can provide screens formatted in WML HTML xHTML and cHTML. This allows for very simple-looking screens or very fancy ones. Some phone vendors have worked with Microsoft to set up special page formats for their devices. However any device that supports at least HTML can use OMA to access Exchange mailboxes. In the next section I ll also show you OMA on a Dell Windows-based PDA. Implementing OMA By default OMA is disabled. You enable it on the same dialog box that you use to configure EAS see Figure 19.1 shown earlier . To make OMA available to your users select Enable Outlook Mobile Access. If you want OMA to send pages to web-enabled devices that haven t been specially set up to receive OMA output select Enable Unsupported Devices. As with other Exchange HTTP-based services-OWA and RCP over HTTP-OMA clients can access a mailbox s home server through front-end servers. They can use the same front-end servers as the other two services. You turn on OMA SSL security the same way you turn on OWA SSL security. See Chapter 18 Exchange Server System Security for more information. Blackberry Enterprise Server The Blackberry Enterprise Server BES has gained great popularity for three reasons It handles all aspects of wireless networking. It takes a sensible approach to network bandwidth. It has been doing everything that MIS and EAS do for about as long. 629 Blackberry Enterprise Server