Error when starting Outlook – Either there is no default mail client of the current mail client cannot fulfill the messaging requirement…

This is actually due to the MSN Messenger Client This bug is related to Windows 64bit, MSN and Office 2010 The simplest fix for us is to remove MSN (since we plan to move towards Lync) Otherwise the error is simply an annoyance Click OK and it will go away till the next time you start Outlook.

 

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