Dump location does not have enough space to export the PST file

This error will occur when the dump location configured for this backup schedule doesn't have enough free space to store the *.PST files. To resolve this, increase the free space or cleanup the used space for the drive which is configured as dump location for this backup schedule. Location configured for dump process can be viewed from 'view backup configuration' of that backup schedule in the Backup->List Backup Schedule page in the client web console.