Custom backup window requirements
The total of all the hours defined in a custom backup window must equal 168--a full week.
A week is defined as starting at 00:00 Sunday, unless you redefine it with a Custom Backup Window.
Ransomware attackers specifically target and attempt to destroy backup systems to increase the probability of payment. Hardening your system is critical. Please ensure you have reviewed your platform security using the Security Hardening Checklist