The Batch Script will allow you to bulk update G Suite users passwords that are located in the "BAT-PasswordsToUpdate.csv" file.
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BAT-PasswordsToUpdate.bat
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@ECHO OFF
CLS
ECHO ------------------------------------------------------------------
ECHO Updating user(s) passwords from the file BAT-PasswordsToUpdate.csv
ECHO ------------------------------------------------------------------
cd C:\Gam\
gam csv BAT-PasswordsToUpdate.csv gam update user ~Email password ~Password
ECHO ---------------------------------------------------------------------------
ECHO Finished updating user(s) passwords from the file BAT-PasswordsToUpdate.csv
ECHO ---------------------------------------------------------------------------