What is the most likely cause of the error message during a bulk user import that indicates "A cell Value under [COLUMN NAME] is in an invalid format?"

The error message indicating "A cell Value under [COLUMN NAME] is in an invalid format" typically points to an issue with the data value provided in the specified column, which aligns well with the interpretation of a cell value being misspelled or missing.

When conducting a bulk import, Smartsheet requires that all data conforms to specific formats or predefined values set for each column. If the value entered does not match the expected format, it will trigger this error. For example, if a date is expected but a text is provided, or if a dropdown column requires specific options and those are not met, the imported data will be invalid. Thus, it's essential that all values are accurate, complete, and formatted correctly according to the requirements of the sheet setup.

In this way, if there is a misspelling of a recognized value or if the value is entirely missing, the system will flag it as an invalid format, resulting in the error message. Correcting these values to ensure they match the expected formats or lists will resolve the error and allow the bulk import to proceed successfully.