HI All In this article I will update you the Dynamics CRM 2013 SP1 I am facing issue in Mail Merge . -In Dynamics CRM 2013 RTM Mail Merge send Email successfully but Activity windows stuck getting this error. Microsoft.Crm.Application.Outlook.WebFormsHost.exe has stopped working. -In Dynamics CRM 2013 Rollup 1 and Rollup2 .Mail Merge Button is not perform any function after click. Solution: After installing Dynamics CRM 2013 Sp1 Mail Merge for Outlook is working fine.