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Mark Wilson

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SharePoint List Validation

Hi

SP2013

I have single text field as part of a list and I need some validation setting up on it

The field has a default value of Unknown. The user can also input values such as 12345678-02.

The validation will be that the value in the field can be Unknown or if it is not Unknown the 9th character must be a dash i.e. -, as in the example above.

Any suggestions welcolme
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Piotr Strycharz
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