Hi @ppl ，
Do you want to choose choices of a sharepoint group in person field?
I'm afraid it's not supported currently.
Two main reasons:
1)Person column is a special column, it gets data from azure ad.
Since there are too many people choice before you enter any word( all the people in your talent), so there will be no data displaying before you type words.
2)Person column gets data from azure ad, not included sharepoint group.
So you can not filter the combo box 's Items based on sharepoint group.
Here is an alternative solution (but a little complex):
1)create an azure group of the same people with your sharepoint group.
remember this azure group's groupid
2)Then in your sharepoint list, customize your sharepoint form, unlock this person field.
3)connect your sharepoint list with office365 Groups.
4)delete the original combo box in this person field
insert a new combo box in this person field, set its Items:
Office365Groups.ListGroupMembers(groupid).value
//please fill in your groupid
Then the combo box will display all the members in this groups. It will display the choices even you not enter any word.
Do not forget to change this data card's Update.
If it is a single person field, change it to :
newcombo box name.Selected
If it is a multiple person field, change it to :
newcombo box name.SelectedItems
Best regards,
