If you are importing data into Bitrix, consider performing data cleansing to ensure that only good quality data is imported into Bitrix.
Some of the fields to cleanse:
Telephone number – to ensure phone numbers are valid, having country code, area code, no dash or dot and are formatted consistently
Address – If you are having address field in a single column, consider breaking it into 3-4 address line, postal code, city, state and country. This will help in reporting and future analytics.
Email – only valid emails are accepted by Bitrix during import. Ensure emails address are in correct format so that no import error occurred.
First Name and Last Name – Use proper case or a consistent case. Remove white spaces and duplicates.
You can do the above cleansing using excel if your data set is not large, less than a thousand records maybe. You can use expression and macro to format, validate and perform auto correction.
I have recently discovered a tool, https://www.trifacta.com/ that can perform cleansing quickly, accurately and in large volume. It’s free to use and is easy to learn to build the cleaning recipe. It has a powerful data profiling capability, allowing you to discover data quality issue and provide suggestion to fix. Consider using this tool to clean your data before importing it into Bitrix.