Hi @Ahmer Ali Khan,
You must export a file using the filter and using the follow command below, replace where clause for your filter:
pdm_extract -f "SELECT id, last_name, userid, inactive FROM ca_contact WHERE userid='servicedesk'" > export.txt
It's will generate a export.txt file, You must replace the last value from "0" to "1", salve the new file as UPDATE.txt and then run the command for UPDATE:
pdm_load -f UPDATE.txt -a -v
The command must run on APP server. Execute on dev enviroment first and save the export file for backup.
TECHDOC: pdm_load command