username=FEDERAL_ID_HERE
password=FED_PASSWD_HERE
domain=CLRC
/archive      /etc/auto.archive
*     -fstype=cifs,ro,credentials=/archive.creds,file_mode=0444,dir_mode=0555,vers=3.0,noserverino,nounix    ://isis.cclrc.ac.uk/inst\$/&

Done. You can now access directories in the archive. Test it by doing: