Hi,
We have a script which is responsible to render configuration pop-up window in CRM 2013. It is using standard JS window object to get outlook host window.

Client reported error and they are using following:
1. MS CRM 2013
Update Rollup 3 for MS Dynamics CRM 2013 SP1 - 6.1.3.119
2. CRM Client for Outlook
Microsoft Dynamics CRM 2013 Service Pack 1 – Update Rollup 3 – 6.1.0003.0119
3. Office Version:
MS Office Professional Plus 2013 SP1 (version 15.0.4569.1506)
I created new environment trying to reproduce and it was working with Outlook CRM client 2013, Outlook CRM client 2013 SP1. However, after I installe Outlook CRM client 2013 SP1 UR1, I got same issue as client.
I am testing on IE v.11.0.9600.18231.
Is there anything known that was changed with Outlook Client SP1 UR1, that is breaking access to window.external object and its methods?
Kind Regards