Microsoft KB Archive Search

Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

  1. Home
  2. Synchronization fails if you sync an external device to a mailbox through EAS in an Exchange Server 2010 environment

Synchronization fails if you sync an external device to a mailbox through EAS in an Exchange Server 2010 environment

View products that this article applies to.

Symptoms

Consider the following scenario:
  • You try to sync a device to a mailbox through Microsoft Exchange ActiveSync (EAS) in a Microsoft Exchange Server 2010 environment.
  • The device uses version 12.1 of the EAS protocol or an earlier version of the protocol.
  • The device sends EAS requests to a Client Access server that is not located in the Active Directory site in which the Mailbox server resides.
  • The Active Directory site in which the Mailbox server is located has a Client Access server that has a published external URL.
In this scenario, the synchronization process fails.

For example, you sync an external Android-based device that uses the EAS 12.1 protocol to a mailbox in a different Active Directory site to the Client Access server that responds the EAS requests. However, the synchronization process fails.

↑ Back to the top

Cause

This issue occurs because the device retrieves an HTTP 451 redirect response. The response redirects the device to the Client Access server that is located in the same Active Directory site as the mailbox. However, devices that use version 12.1 of the EAS protocol or an earlier version of the protocol cannot recognize the HTTP 451 redirect response.

↑ Back to the top

Resolution

To resolve this issue, install the following update rollup:
2746164 Description of Update Rollup 6 for Exchange Server 2010 Service Pack 2

↑ Back to the top

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

↑ Back to the top

More Information

For more information about the HTTP 451 redirect response, go to the following Microsoft website:
General information about the HTTP 451 redirect response

↑ Back to the top

Keywords: kbqfe, kbfix, kbexpertiseinter, kbsurveynew, kb

↑ Back to the top

Article Info
Article ID : 2751417
Revision : 1
Created on : 1/7/2017
Published on : 2/12/2013
Exists online : False
Views : 341