Hi,
I'm trying to print letters using Microsoft Dynamics CRM 2013 Mail Merge facility from CRM for Outlook Client.
Everything works fine until the end and I can also successfully print letters using Mail Merge, however when I try to create these activities in CRM as a CRM Letter Activity, that's when I receive the below error and it does not create any activities in
CRM.

This specially happens when I click on Activity Details button and change the Subject of the Activity and I receive this error. If I do not go via the Activity Details, then CRM successfully created the activity.
Please help if anyone has been through this and found the solution.
Thank you,
Regards,
Gagandeep Singh
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