Location line disappear in Outlook 2010

Hello.

We have a problem since 6 months.

When i create an appointment in Outlook (2010) and set regarding to our CRM (2013) then disappear the location line after synchronizing with Outlook when i open the appointment in Outlook.

We have a workflow in CRM. The result of this WF --> copy information in location line.

After synchronizing the appointment, the appointment in Outlook has the same content like CRM.

Everbody has the same problem?

Thanks for your response.