Hi @sharonde ,
Could you please share more details about the error message within your app?
Do you want to update the Person column of your SP List with the result the Office365Users.SearchUser({searchTerm: TextInput1.Text}) formula returns when you open a New form?
Where do you put the Office365Users.SearchUser({searchTerm: TextInput1.Text}) formula?
Further, do you enable "Allow Multiple Selections" option for the Person column in your SP List?
Based on the needs that you mentioned, I have made a test on my side, please take a try with the following workaround:
1. If the Person column is a Single selection column in your SP List:

Set the DefaultSelectedItems property of the ComboBox within the Executor (Person column) data card in my Edit form to following:
If(
EditForm1.Mode = FormMode.New,
{
Claims:"i:0#.f|membership|" & Lower(First(Office365Users.SearchUser({searchTerm: DataCardValue9.Text})).Mail),
DisplayName: First(Office365Users.SearchUser({searchTerm: DataCardValue9.Text})).DisplayName,
Email: First(Office365Users.SearchUser({searchTerm: DataCardValue9.Text})).Mail,
JobTitle:"",
Department:"",
Picture:""
},
Parent.Default
)
On your side, you should set the DefaultSelectedItems property of the ComboBox within the Person data card in your Edit form to following:
If(
EditForm1.Mode = FormMode.New,
{
Claims:"i:0#.f|membership|" & Lower(First(Office365Users.SearchUser({searchTerm: TextInput1.Text})).Mail),
DisplayName: First(Office365Users.SearchUser({searchTerm: TextInput1.Text})).DisplayName,
Email: First(Office365Users.SearchUser({searchTerm: TextInput1.Text})).Mail,
JobTitle:"",
Department:"",
Picture:""
},
Parent.Default
)
2. If the Person column is a Multiple selections column in your SP List:
Please set the DefaultSelectedItems property of the ComboBox within the Person data card in your Edit form to following (save multiple person values into the Person column in your SP list):
If(
EditForm1.Mode = FormMode.New,
ForAll(
Office365Users.SearchUser({searchTerm: TextInput1.Text}),
{
Claims:"i:0#.f|membership|" & Lower(Mail),
DisplayName: DisplayName,
Email: Mail,
JobTitle:"",
Department:"",
Picture:""
}
),
Parent.Default
)
Please consider take a try with above solution I provided, then check if the issue is solved.
Best regards,