Async client breaks for Microsoft Dynamics AX2012 R3 CU 10 to CU 11 upgrade

The changes in the hotfix suggest that you need to first update the Async client at your stores if you need to support N-1 scenario for your upgrade from CU 10 to CU 11. You are suggested only installing the Async client component even though additional components are shipped with this hotfix. Once you have updated all of your stores with this update, you can safely upgrade your headquarters to CU 11. Once your headquarters are updated to CU 11, you can start upgrading your stores to CU 11 as needed.

Hotfix information

A supported hotfix is available from Microsoft. There is a "Hotfix download available" section at the top of this Knowledge Base article. If you are encountering an issue downloading, installing this hotfix, or have other technical support questions, contact your partner or, if enrolled in a support plan directly with Microsoft, you can contact technical support for Microsoft Dynamics and create a new support request. To do this, visit the following Microsoft website:

https://mbs.microsoft.com/support/newstart.aspx

You can also contact technical support for Microsoft Dynamics by phone using these links for country specific phone numbers. To do this, visit one of the following Microsoft websites:

Partners

https://mbs.microsoft.com/partnersource/resources/support/supportinformation/Global+Support+Contacts

Customers

https://mbs.microsoft.com/customersource/support/information/SupportInformation/global_support_contacts_eng.htm

In special cases, charges that are ordinarily incurred for support calls may be canceled if a Technical Support Professional for Microsoft Dynamics and related products determines that a specific update will resolve your problem. The usual support costs will apply to any additional support questions and issues that do not qualify for the specific update in question.