when you need to reconcile users and have match rule which change target system attribute value for matching you can use 'tokenize' .
For example, i have target system who has value in the match attribute containing logic where first part is unique identifier and rest are other information not required and all separated by "_" , i can use tokenize to pull the first part which is my identifier key to match the IDM attribute which hold same value
example: target match attribute has following value where '1111' is my IDM unique identifier attribute
1111_test_test
the setup will be:
Delimiters: '_'
Token number: 1 (this will pull first word in list)
Space Delimiter = FALSE (not required)
