Is it possible to define the range in the configuration file?
For example, between 1 and 1000 mailboxes.
I believe each entry has to be specified in the configuration file line per line.
I think so, I’ve researched too much or different combinations of mbox entries have not been accepted, only the line is accepted.
assignment as dynamic can be very successful.
You could always us an external script to create the boxes, or use dynamic realtime for your voicemail configuration.
Are there any documents for this process?
https://wiki.asterisk.org/wiki/display/AST/Realtime+Database+Configuration
the file mysql_config.sql located in contrib/realtime/mysql defines the voicemail table needed for realtime to work with MySQL.