We have recently been upgraded to Microsoft CRM 2013 on our on-line based CRM. Previously, we had set up workflows to create emails from a number of records, including the Opportunity record. The Outlook email would be sent with a link to the CRM record. Now, we are getting cases where the record attachment changes from the appropriate record (in the viewing bar under the email) to "None". The record will be visible, and then suddenly change to "None". This can happen immediately or several hours after sending the email. (Our users are all set to synchronize every 15 minutes). Then, there is no link to the record. This doesn't always happen, but seems to happen more regularly for individuals who have Office 2013 (some users still have Office 2010).
This problem was not observed with Microsoft CRM 2011.
Any ideas?