Restoring user email password from /home/<UNIX>/etc/<DOMAIN>/shadow file. But @pwcache/<USER> ?

Hello, changing in CPANEL the mailquota of some mail users has changed involuntarily also there password (webbrowser filling in random **** in the password field ???). So some users cant login anymore. We have backups of /home//etc//shadow so we could replace the lines of the "upgraded" users by the corresponding line in the backup op /shadow But, I see there is also an encrypted password in files like /home//etc//@pwcache/ Is there a script to be run so CPANEL does update these @pwcache files from the manually (of from backup restored) changed /shadow file ? Thanks for help and best regards