Late to the party, but yes, backup and restore is the recommended upgrade path from 13 to 15.
I agrre!! and from 14 to 15 , what is the best way to upgrade ?
Two ways are recommended, the PBX Upgrader tool or backup and restore. Both work pretty well.
Notes on how to upgrade from 14 to 15:
This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.