Map ADFS MemberOf String to Drupal Role?

Hi,

I cannot for the life of me map an ADFS memberOf string to a Drupal role. Any suggestions?

Details as follows.

I have installed SimpleSAML on the server, setup Drupal as a SP and can log into Drupal using ADFS credentials.

When I look as the SimpleSAMLphp admin page:
https://example.com/simplesaml/module.php/core/authenticate.php?as=defau...

I see the memberOf strings as an attribute with this name:
urn:oid:1.2.840.113556.1.2.102

and values like this:
CN=GU_MyMGS_Parent,OU=MyMGS,OU=Common,OU=User Groups,OU=Security Groups,OU=My Grammar,DC=mgs,DC=local

The urn:oid:1.2.840.113556.1.2.102 attribute is not going into the Name, UID or Email fields. Does that mean it's not available for role mapping?

I have tried the following role mapping combinations. You can probably tell I am clutching at straws.

11:urn:oid:1.2.840.113556.1.2.102,=,"CN=GU_MyMGS_Parent,OU=MyMGS,OU=Common,OU=User Groups,OU=Security Groups,OU=My Grammar,DC=mgs,DC=local"
11:groups,=,"CN=GU_MyMGS_Parent,OU=MyMGS,OU=Common,OU=User Groups,OU=Security Groups,OU=My Grammar,DC=mgs,DC=local"
11:"urn:oid:1.2.840.113556.1.2.102",=,"CN=GU_MyMGS_Parent,OU=MyMGS,OU=Common,OU=User Groups,OU=Security Groups,OU=My Grammar,DC=mgs,DC=local"
11:urn:oid:1.2.840.113556.1.2.102,@=,CN=GU_MyMGS_Parent
11:memberof,@=,CN=GU_MyMGS_Parent

However, my users are not being created with Drupal roles.

I also tried setting SimpleSAMLphp onfig.php like this:
'class' => 'core:AttributeMap', 'oid2name'

As per this post
https://www.drupal.org/node/1931394

However, I've no idea if there is a user friendly name for urn:oid:1.2.840.113556.1.2.102 and that change didn't help so, I rolled it back.

Is what I'm trying to do even possible?

Thanks

Regards

Brett Sh