Mapped attribute and regex not returning expected result

[Lipscomb, Gary]

Hi,

I'm using the following to include all digits up to the first Alpha character from the employeeNumber

<AttributeDefinition xsi:type="Mapped" id="employeeNumber_NO_Apha" sourceAttributeID="employeeNumber">
    <Dependency ref="ldap" />
    <DisplayName xml:lang="en">Employee Number</DisplayName>
    <AttributeEncoder xsi:type="SAML1String" name="urn:mace:dir:attribute-def:employeeNumber" />
    <AttributeEncoder xsi:type="SAML2String" name="urn:oid:2.16.840.1.113730.3.1.3" friendlyName="employeeNumber" />
    <ValueMap>
        <ReturnValue>$1</ReturnValue>
        <SourceValue>^(\d*)(.?)</SourceValue>
    </ValueMap>
  </AttributeDefinition>

If the employeeNumber is
    12345678           it  returns    12345678      as expected
    12345678A        it returns     12345678      as expected
    1234A                 it returns     1234                as expected

    1234A5678        it returns      nothing        but I expected 1234. The attribute is not populated

Using https://regex101.com/ the above expression returns Group 1 as '1234' and Group 2 as 'A'

Any suggestions

Regards

Gary

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