If one Audrey is serving the others, then the log file for one will be the same for all. Therefore, you should only enable call logging on one of the Audreys, and log it to the share. As for the database file, you can point all the Audreys at the same one, while still keeping each Audrey's config settings unique. Here's how:
On all the Audreys, run something like this:
acid -f /myshare/acid/mydatabase.txt -l /myshare/acid/logfile.txt
Since -a was not specified, it will use the local /nto/acid for all files. But, since the -f file (database) and the -l file (call log) both specify full paths, it will use those files for those features instead of /nto/acid.
Now go around to each Audrey except one and turn off call logging, but turn on "load log file at startup", so you can see the history each time it starts up. On the last Audrey, turn on both call logging and load-on-startup. This will be the only one that does any actual logging.
Note that all the config/options info will be in the acidoptions.bin in each Audrey's /nto/acid directory, so they can all be different.
ACID and other Audrey apps