I have the following sheet:
User 1 will enter the Client Name and Historical Data Load Date via a form.
This triggers an update request to User 2 to provide the FHIR Ball Catchup Set Date.
This date must be BEFORE the Historical Data Load Date.
I have the sheet set to flag the row if the FHIR date is AFTER the Data Load Date.
BUT I would like for USER 2 to not be able to even enter a date that is after the FHIR date. User 2 uses an update request form to add the date. How can I build in the logic so that USER 2 doesn't enter a good date?