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The Microsoft Dynamics CRM Sustained Engineering (SE) team released Microsoft Dynamics CRM 4.0 Update Rollup 21 on Thursday, February 9, 2012.
The links below will take you to the necessary information about Update Rollup 21.
Microsoft Download Center: http://www.microsoft.com/download/en/details.aspx?id=28799
Microsoft Knowledge Base Article: http://support.microsoft.com/kb/2621054
General details about Update Rollup 21
Update Rollup 21 is cumulative. However, the Update Rollup 21 CRM Client and Data Migration Client packages require Update Rollup 7 to be installed. For all other CRM components, you do not need to install any previous Update Rollups prior to Update Rollup 21.
The Update Rollup 21 download contains updates for the 40 supported Language Packs. Prior to installing the Update Rollup 21 Language Pack, you must install the original Language Pack.
If you have Language Packs installed, you should
Download the Update Rollup 21 Language Pack
Install the Update Rollup 21 Language Pack
De-provision the Language Pack
Re-provision the Language Pack
Information about how to avoid reboots when installing the CRM Outlook Client can be found in the Update Rollup 4 blog posting.
The Update Rollup 21 Client can be deployed before the server is upgraded to Update Rollup 21.
Steps to make the Update Rollup 21 Client available via AutoUpdate can be found in the Update Rollup 4 blog posting. The Link and Patch IDs can be found in KB article 2550098.
Each update rollup could have fixes that require manual configuration. Please see the “Hotfixes and updates that you have to enable or configure manually” section in KB article 2621054.
Future Updates for CRM 4.0
Due to the low volume of fix requests for CRM 4.0, the CRM SE team will stop shipping CRM 4.0 rollups on a regular schedule. CRM SE will service CRM 4.0 requests on an individual basis using our Critical On-Demand process.
CRM SE will continue to evaluate the need for Update Rollups for the remainder of CRM 4.0’s supported lifecycle. A rollup will be shipped if there is a significant increase in fix request volume or in the event that a rollup will benefit a majority of the 4.0 installation base.
How to get support for Update Rollup 21
For support, please contact Microsoft Product Support. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site: http://support.microsoft.com/default.aspx?scid=fh;[LN];CNTACTMS.
Note: In special cases, charges ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costswill apply to additional support questions and issues that do not qualify for the specific update in question.