We have found one software suitable in our database for this conversion.
It is possible to import contacts in CSV format to Outlook and add that to the personal account, which is what csv to pst conversion might be represent. But this is actually not a direct file conversion, just import/export work in the address book. Numerous utilities for Outlook exist on the Internet, so perhaps one might help you out with your issues as well.
Updated: August 8, 2023
CSV
Files with csv extension are text data files in common Comma Separated Value file format. Simple text file with values divided by comma, often used as an import/export format.
PST
A pst file extension is used for storage file format of Microsoft Outlook. PST file contains stored emails, calendars, contacts in one single file.