I would like to backup my customer's PCs over slow links as mentioned in the subject.
Facts:
Veeam Agent for Windows licenses were bought.
Customer's office is connected to our company by IPSec tunnel: LAN-to-LAN
Office's PCs ( connected by LAN or Wi-Fi ) can backup entire computer to our:
* Veeam backup repository ( Veeam B&R v. 9.5 update 3 Standard license )
or
* Shared folder
Mobile users can connect to office by SSL VPN Client and make similar backup
routed to our company by tunel mentioned above.
I visited custommers office and made initial entire backups to my local disk which were initial backups for backup jobs.
Mobile users aren't easy available and backup jobs would start from initial Full Backup.
Questions: # I worry about slow backup speed and long backup time ...
How to optimize backup process ?
Which is better: backup to Veeam backup repository or to shared folder ?
Which type of backup is better: Incremental, Reverse Incremental ?
Any advices, suggestions, recommendations will be greatly appreciated

I started to read Veeam technical documentation of course but no easy answers found.
Regards,
Janusz Such