locking individual cells?

E

Erica

Hello!
I am creating a worksheet that i want other users to have access to.
However, there are certain cells that are required by the user to fill out.
Is there a way to lock certain cells that are required and if the user does
not fill in the required cells, then an "error" box would populate (saying:
all required cells must be completed) when they try to save the worksheet?
Please help.

Thank you!!!
 
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