Microsoft AAD with SAP HANA Database

Hi,

I have integrated Microsoft Active Directory with SAP HANA SAML.am not able to create a user with special character in SAP HANA database but the user email id is having special characters so microsoft active directory is passing the userID with special characters (t.test) to SAP HANA database which SAP HANA database is not able to identify the user. can someone please help me out how to pass the userID without special characters present in email ID "t.test@XXXXX.com" as "ttest" to SAP HANA database .