Too Slow Quick Campaign and Outlook Diagnostics - CRM Online

Hi,

Yesterday we executed a Quick Campaign - Mail Merge to about 4000 contacts.  It took about 10 hours sending mails to these contacts. This is too slow.  Could you please advise what could be the reason and a solution.

I also tried to open the Diagnostics tool from here:

Start Menu -> All Programs -> Microsoft Dynamics CRM 2011 -> Diagnostics

However, it does not show 'Run' button as following page on Technet mentioned:

technet.microsoft.com/.../dd979083.aspx

We are using Dynamics Online and its Outlook Ad-in.  The Email Access Type is 'Microsoft Dynamics CRM for Outlook'.

Thanks in advance,

Saima