Unable to edit Forecast Category field on Opportunity
|Knowledge Article Number||000188463|
|Description||You might notice that some users, including the System Administrator, are unable to edit the Forecast Category field on Opportunity records.|
This field can only be edited by the Opportunity Owner, other users (including System Administrators) are unable to edit this field.
The Note, in below documentation, applies to both types of Forecasting
Configure opportunity forecast category field settings via field level security
With Process Builder it is possible to update the Forecast Category, an example on how to implement this for System Administrators, so they can adjust manually:
How can system admin update the Forecast category for Opportunity owned by other users?