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Exchange Server 2010 : IMAP, POP, and Microsoft ActiveSync (part 3) - Autodiscover & ActiveSync

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3/28/2011 6:04:07 PM

4. Autodiscover

The Autodiscover service provides clients running Outlook 2007, Outlook 2010, and mobile phones running Windows Mobile 6.1 or later with user profile configuration settings. To use Autodiscover, it is necessary to either provide the user’s email address and password or have the user’s domain credentials. For example, when Autodiscover is configured correctly, Kim Akers can log on to a new PC in the Contoso domain that has Office 2010 installed, open Outlook, and instantly interact with her Exchange mailbox as Outlook is automatically configured through Autodiscover.

You can use the Test-OutLookWebServices cmdlet from the EMS to verify that the Autodiscover service settings are working properly for Outlook 2007 and 2010 clients. For example, to check that Autodiscover is functioning properly on server CAS01, use the following command:

Test-OutlookWebServices -ClientAccessServer CAS01


Note:

UNDERSTANDING AUTODISCOVER

To learn more about Autodiscover, consult the following reference on TechNet: http://technet.microsoft.com/en-us/library/bb124251.aspx.

5. ActiveSync

ActiveSync allows users to sync their Windows Mobile devices with their Exchange mailboxes. ActiveSync is optimized to work across high-latency, low-bandwidth networks, such as those likely to be encountered across a mobile phone data connection. Exchange ActiveSync is enabled automatically when you install the Client Access server role.

You can configure ActiveSync settings either by editing the ActiveSync virtual directory or by configuring ActiveSync mailbox policies. You can edit the properties of the ActiveSync virtual directory from within the EMC by navigating to the Server Configuration\Client Access node, selecting Exchange ActiveSync on the lower-middle page, right-clicking on the Client Access server that you want to modify, and then clicking on Properties. This will bring up the Microsoft-Server-ActiveSync Properties dialog box, as shown in Figure 7.

Through this dialog box, you can modify the following ActiveSync properties:

  • Internal URL The URL that ActiveSync devices on the internal network use to access the Client Access server.

  • External URL The URL that ActiveSync devices on the Internet use to access the Client Access server.

    Figure 7. ActiveSync properties

  • Basic Authentication Whether basic authentication is enabled

    • Ignore Client Certificates Client identification certificates are ignored during authentication.

    • Accept Client Certificates Client identification certificates, issued by a CA trusted by the Client Access server, are accepted for authentication.

    • Require Client Certificates Client identification certificates, issued by a CA trusted by the Client Access server, are required for authentication.

  • Remote File Servers Block List A list of servers that ActiveSync devices cannot access.

  • Remote File Servers Allow List A list of servers that ActiveSync devices can access. If a server is on both the block list and the allow list, the block list takes precedence.

  • Remote File Servers Unknown Servers Whether the ActiveSync device should be granted access to or blocked from a server that is on neither the allow list nor the block list.

  • Internal Domain Suffix Which domain suffixes should be treated as being internal.

You can also configure these properties using the Set-ActiveSyncVirtualDirectory cmdlet. The Test-ActiveSyncConnectivity cmdlet allows you to test that ActiveSync is functioning properly. It does this by simulating a full synchronization against a specific mailbox. For example, to test ActiveSync connectivity for the mailbox Kim_Akers on Client Access server CAS01, issue the following command:

Test-ActiveSyncConnectivity -ClientAccessServer CAS01 -URL http://adatum.com/mail
-MailboxCredential "Kim_Akers"



Note:

UNDERSTANDING ACTIVESYNC

To learn more about ActiveSync, consult the following reference on TechNet: http://technet.microsoft.com/en-us/library/aa998357.aspx.


5.1. ActiveSync device policies

ActiveSync Mailbox Policies allow administrators to specify settings that apply to mobile devices, such as whether a device requires a password, encryption, and what the mobile phone should do if a user enters incorrect password several times in succession. To create a new ActiveSync Mailbox Policy, perform the following general steps:

  1. Select the Organization Configuration\Client Access node within the EMC.

  2. In the Actions pane, click on New Exchange ActiveSync Mailbox Policy.

  3. On the New Exchange ActiveSync Mailbox Policy Wizard, shown in Figure 8, enter a policy name and configure the following settings:

    • Allow nonprovisionable devices: Allow devices that do not support all policies to sync with Exchange.

    • Allow attachments to be downloaded to device: Allow devices to retrieve attachments.

    • Require password: When you require a password, you can also configure password settings, such as whether an alphanumeric password is required, if password recovery is allowed; whether data stored on the device must be encrypted; whether simple passwords are allowed; minimum password length; idle time before a password is required again; whether password history is enforced; and the length of time before the password must be changed.

Figure 8. New ActiveSync Mailbox Policy


Once you create the policy, you can configure additional settings by editing the policy properties through the EMC or by using the Set-ActiveSyncMailboxPolicy cmdlet from the EMS. Editing the policy gives you access to the Sync Settings tab, shown in Figure 9. These settings allow you to specify which calendar and email items can be synced, whether Direct Push is enabled, whether HTML-formatted email can be sent to the device, and whether there is a limit on the size of attachments that can be sent to the device.

Figure 9. Sync Settings


On the Device tab, shown in Figure 10, you can specify what features on the device are allowed on the device. You can use this policy to allow removable storage, camera, Wi-Fi, infrared, Internet sharing (also known as tethering), remote desktop, desktop synchronization, and Bluetooth. When these features are disabled on mobile phones running compatible versions of Windows Mobile, users are unable to access them. For example, you could disable cameras on phones that have cameras through ActiveSync Mailbox policy if you worked in a sensitive environment where you did not want users taking photographs. These policies are enforced only when the associated mailbox has an Enterprise Client Access License (CAL).

The Device Applications tab allows you to specify whether the device can run a browser, consumer mail, unsigned applications, and unsigned installation packages. The Other tab, shown in Figure 11, gives you the option of allowing or blocking specific applications on the device. These features are also available only if the associated mailbox has an Enterprise CAL.

Figure 10. ActiveSync device settings


Figure 11. Allowed and denied mobile applications


You can manage mobile devices, including performing a remote wipe of the device, from the EMS. When you choose to remote-wipe a device, it resets the device to its factory default, deleting all configuration settings and personal data. There are four EMS cmdlets that you can use to manage mobile devices:

  • Get-ActiveSyncDevice This cmdlet can be used to list all the mobile phones that have been paired with mailboxes in the organization.

  • Get-ActiveSyncDeviceStatistics This cmdlet can be used to provide information about devices that are paired to specific mailbox.

  • Clear-ActiveSyncDevice This cmdlet can be used to wipe a mobile device.

  • Remove-ActiveSyncDevice This cmdlet is used to sever the relationship between a specific mailbox and a mobile device.

When OWA policies are configured appropriately, it is also possible for users to perform a remote wipe on a mobile device from OWA.


Note:

CONFIGURING ACTIVESYNC MAILBOX POLICIES

To learn more about configuring ActiveSync mailbox policies, consult the following link on http://technet.microsoft.com/en-us/library/bb123484.aspx.



Note:

Remember that Client Access servers do not have the POP3 and IMAP4 services enabled by default.

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