An Exchange Archiving job is Forever Incremental. There is an option however “Convert job to full” (“On the Archive Options tab, if you want to run the job as a full back up job, select the Convert job to full checkbox.” https://documentation.commvault.com/11.23/expert/29004_running_exchange_mailbox_agent_archiving_job.html).
Is this the same as a Full backup? If so, why is making a Full backup not an option, instead of converting an Incremental job to a full (that seems unnecessarily complicated then)? Can it be scheduled also? Or is there any difference in functionality?