Get the list of email addresses into a file - from any PCDS node enter:
ldapsearch -x -b cn=ps-users,ou=Group,dc=reg,o=slac | grep memberUid | sed 's/.*: //g' | sed 's/$/@slac.stanford.edu/' > psusers-sep-2020.txt
(Note: all addresses look like <user>@slac.stanford.ed, even for non SLAC people: this works because all users have a .forward file in their AFS home.)
On https://listserv.slac.stanford.edu/cgi-bin/wa select: List management -> Subscriber management -> Bulk operations -> 'Remove all subscribers from PCDS-USERS-L, and add the imported addresses'. Then click 'Choose file', select the file generated above, then 'Import' and the list gets updated.
