Microsoft has released Update Rollup 15 for Microsoft Dynamics CRM 2011 Server, Microsoft Dynamics CRM for Microsoft Office Outlook, Microsoft Dynamics CRM 2011 Language Packs, and Microsoft Dynamics CRM 2011 Email Router.
For more information about this release, see Microsoft Knowledge Base article 2843571:
Update Rollup 15 is available for Microsoft Dynamics CRM 2011
To maintain parity between the application components of Microsoft Dynamics CRM 2011, this update rollup includes packages for Microsoft Dynamics CRM Server, Microsoft Dynamics CRM for Outlook, Microsoft Dynamics CRM Language Packs, and Microsoft Dynamics CRM Email Router.