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I am trying to add validation on multiple dates in SharePoint list.

Example: If end date is added by user the start date shall be mandatory. The start date shall not be greater than end date.

=IF(ISBLANK([End date]),TRUE,[End date]>=[Start date])

This is not working and not making start date mandatory.

1 Answer 1

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Use below formula for your list validation settings:

=IF(ISBLANK([End date]),TRUE,AND(NOT(ISBLANK([Start date])),[End date]>=[Start date]))

You have to add this formula under List Validation settings.

Follow below steps:

  1. Go to SharePoint list
  2. Click on Settings icon and select List settings
  3. Select Validation settings
  4. Add formula & user message and click Save

Related threads:

  1. Validation Column Not Working
  2. List validation if then syntax

Note:

  1. Sometimes comma(,) does not work in formula (It is based on language or regional settings on your site). So in that case use semicolon(;) instead of comma(,).

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