When importing a spreadsheet in Mimecast, what must be included?

When importing a spreadsheet into Mimecast, it is essential to include a header cell. This header cell acts as a label for the data contained within each column and is crucial for identifying the purpose of the data during the import process. Properly formatted headers ensure that Mimecast can accurately interpret and map the data in the spreadsheet to the corresponding fields in its system.

The header cell provides structure to the data, allowing for seamless integration into Mimecast's functionalities. Without a header cell, the system might not recognize the data correctly, leading to potential errors or incomplete uploads. Thus, including a header cell is a key requirement for successful data importation in Mimecast.