You can find this setting in the preferences menu:
You can also configure this setting via registry/GPO/MDM:
Key name: EnableCoAuthoring Key type: REG_DWORD
Controls how KONNEKT treats Microsoft Office files.
KONNEKT handles up- and downloads to SharePoint Online for Microsoft Offices files.
Files are opened exclusively - Office 365 Co-Authoring is not working.
KONNEKT will delegate the file-handling to the Microsoft Office apps.
Microsoft Office 365 Co-Authoring is active.
The default value is 1 (enable)
We recommend to use our ADMX template to configure this setting.