How to normalize email domains before user resolution in inbound email

Anjan 2025
Tera Contributor

Hi,
I have a scenario where few employees has two mail ID,

*@company.com         *@XYZ.company.com

For few only one ID is stored in sys_user table, eg :  ABC@company.com is present in sys_user table and ABC@XYZ.company.com doesn't exist in sys_user table. So when mail sent from ABC@XYZ.company.com servicenow doesn't recognize them and treat them as Guest.
 I want both the domain to be considered without doing any changes in sys_user table.  Ideally, when an email comes from @XYZ.company.co, it should be normalized to @company.com before inbound email action run since the “User ID” is already being populated in the Email Log before my actions can handle it.
I couldn't find any Script Include which is populating "User ID" field in sys_email table. Please guide me on this.

Thanks in advance

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