You Had Me At EHLO... : Upgrading Exchange ActiveSync to Exchange 2010:
"What happens when the user's mailbox is moved to Exchange 2010?
For this scenario, the important thing to understand is how is the device currently configured? Either the device is utilizing the legacy.contoso.com namespace (due to Autodiscover during device setup or due to the redirect), or the device is utilizing the mail.contoso.com namespace (and thus CAS2010 is proxying to the legacy CAS or Exchange 2003 mailbox server).
For the Autodiscover-supported device scenario case:
1. User3's device is already configured to use the namespace legacy.contoso.com.
2. User3's device attempts to synchronize.
3. CAS2007 will authenticate the user and access Active Directory and retrieve the following information:
1. User's mailbox version
2. User's mailbox location (AD Site)
3. The EAS virtual directory ExternalURL of the Client Access Server(s) that matches the mailbox version, located within the mailbox's AD site
4. Since the user's mailbox version is now greater than the CAS2007 version, CAS2007 must either respond with a 403 or 451 response code. Since the ActiveSync protocol version of User3's device is 12.1 or later, the device supports Autodiscover. Therefore, CAS2007 will return a response (HTTP error code 451) indicating that the device should use mail.contoso.com namespace for all synchronization events.
5. The device updates its profile to use mail.contoso.com and attempts to synchronize with mail.contoso.com.
6. CAS2010 will authenticate the user and retrieve and render the mailbox data from the Exchange 2010 mailbox server and will provide the rendered data back to the device.
For the legacy device case:
1. User1's device is already configured to use the namespace mail.contoso.com.
2. User1's device attempts to synchronize.
3. CAS2010 will authenticate the user and access Active Directory and retrieve the following information:
1. User's mailbox version
2. User's mailbox location (AD Site)
3. The EAS virtual directory ExternalURL of the Client Access Server(s) that matches the mailbox version, located within the mailbox's AD site
4. The EAS virtual directory InternalURL of the Client Access Server(s) that matches the mailbox version, located within the mailbox's AD site
4. Because the device does not support Autodiscover (protocol version is less than 12.1), prior to the mailbox move, CAS2010 simply proxied the ActiveSync traffic to CAS2007. Now that the mailbox is moved, CAS2010 simply retrieves and renders the mailbox data from the Exchange 2010 mailbox server.
5. CAS2010 will expose the data to the end user.
- 已使用 Google 工具列寄出"
