We migrated a calendar list from SharePoint 2010 to modern online SharePoint. In older SharePoint we could do in-line editing or Data Sheet View editing in the "All Day Event" calendar field. During the migration process the 'yes/no' entries for this field were not copied over.
In modern SharePoint, the 'All Day Event' field is visible, but not editable the same way. Each item can be opened individually in edit form and checkbox for this field can be checked but that's not a feasible solution for hundreds of line items. Even to add new items, users prefer to copy multiple Excel rows and paste to the SharePoint list and 'All Day Event' field remains blank.
Need help to determine how to enable this field to accept values in Quick Edit view or at least have 'All Day Event' set to True as default. This field shows in modify view window but not under 'Columns' in list settings for us to edit default entry.
Reading another post, I checked to ensure that Event management is turned on, and Event is already a default content type for this list. Scripting is not a good option as we may not be allowed to use it.
trueby default at list level. You can try changing it at site column level. Note: It will change the default selection for all lists using event content type in this SharePoint site.