How can I set a DateTime value into an exAttribute through CustomSchema?

If you are trying to store a DateTime value in an exAttribute using DateStringProperty, this will not work as expected for ex attributes.

The reason is that DateStringProperty is not currently supported on ex attributes. It expects an AD attribute definition in ConnectorSchema, which causes an exception internally. That exception is handled silently, so the value does not save and no obvious error is returned.

The following schema definition is not supported for ex attributes:

Although the script can read the value as a DateTime, assigning it back to the exAttribute in this way will not persist correctly.

Option 1: Store the value as a string

Store the date as a string and parse it whenever you need to use it.

This is the safest and recommended approach.

Option 2: Use the syntax attribute

Try defining the property with the syntax attribute set to Date Time instead:

This may be a suitable alternative depending on how the attribute is being used.

Option 3: Custom script parsing

Modify the Active Directory script logic to parse your chosen date format string and return a DateTime object.

This is an advanced option and should be approached with caution, as incorrect changes can have wider system impact.