You can also perform auditing and logging information in SAP SRM. The user information system can be used to check the details about user, roles, profiles and authorizations.
To check change documents for users, use T-code — SU01
You will be directed to the next window where you can enter the selection criteria.
To enter the user information system and to check wide range of functions related to user history, use T-code — SUIM
You can expand each of the section to see the Change history. Various change/audit logs can be checked using the User Information System.
To view Business Partner history, you can use T-code — BP