CA Single Sign On Secure Proxy Server (SiteMinder)AXIOMATICS POLICY SERVERCA Single Sign On SOA Security Manager (SiteMinder)CA Single Sign-On
Chrome browser users are unable to edit SharePoint documents in Excel. The document opens, but when the user clicks the button to edit the document in Excel, the expected pop up never appears. This is not affecting IE users, and is only affecting external users who go through an external reverse proxy.
The following header, set in the OWA SharePoint farm, was causing the problem: