The Office 365 ProPlus update channel names are all over the place. Different names in different products and places. I have put them below for easy reference.
| Office ProPlus Update Channel | Config.XML Name | Intune CSP |
|---|---|---|
| Monthly Targeted | Insiders | InsiderFast |
| Monthly | Monthly | Current |
| Semi Annual Targeted | Targeted | FirstReleaseDeferred |
| Semi Annual | Broad | Deferred |