Microsoft has released Update Rollup 4 for Microsoft Dynamics CRM Server 2011. It includes updates and hot fixes packaged together for easy deployment. We recommend that you install the update rollup to keep your software performing at its best.
Important:

You must have Microsoft Dynamics CRM Server 2011 installed to apply this update rollup.

Update Rollup 4 is available for all languages that are supported by Microsoft Dynamics CRM Server 2011.

Update Rollup 4 will be available from Microsoft Update on September 22, 2011.

For more information about this release, see Microsoft Knowledge Base article 2556167: Update Rollup 4 is available for Microsoft Dynamics CRM Server 2011.

Update Rollup 19 for Microsoft Dynamics CRM 4.0
Microsoft has released Update Rollup 19 for Microsoft Dynamics CRM 4.0. It includes updates and hot fixes packaged together for easy deployment. We recommend that you install the update rollup to keep your software performing at its best.
Important:

Update Rollup 7 is a prerequisite to this update rollup. The Microsoft Dynamics CRM for Microsoft Office Outlook and Microsoft Dynamics CRM Data Migration Manager components require Update Rollup 7 to be installed. 

For more information about Update Rollup 7, see the Microsoft Knowledge Base article: 971782: Update Rollup 7 for Microsoft Dynamics CRM 4.0 is available.

Update Rollup 19 is available for all languages that are supported by Microsoft Dynamics CRM 4.0.

For more information about this release, see Microsoft Knowledge Base article 2550097: Update Rollup 19 for Microsoft Dynamics CRM 4.0 is available.