====== FreePBX - Shared Mailbox ======
http://www.freepbx.org/support/documentation/howtos/how-to-make-multiple-extensions-use-a-common-voicemail-box
===== Symbolic Links =====
Here, we link the shared mailbox 201 to another extension (202) so that both extensions share the same voicemail mailbox.
Log into the PBX as 'root'.
cd /var/spool/asterisk/voicemail/default
If the voicemail mailbox 202 already exists:
mv 202 202.orig
then
ln -s 201 202