Box 1: aXXXX @XXXX.com -
The Email masking method, exposes the first letter and replaces the domain with XXX.com using a constant string prefix in the form of an email address.
Example:
[email protected] -
Box 2: 1900-01-01 -
Use 01-01-1900 (or 1900-01-01) for date/time data types (date, datetime2, datetime, datetimeoffset, smalldatetime, time).
Reference:
https://docs.microsoft.com/en-us/azure/azure-sql/database/dynamic-data-masking-overview