Primary Array:
Drag and drop two 120 GB SSD hard drives to the primary array bay. Open the primary array and select RAID 1 as the RAID level. RAID 1 provides fault tolerance of one drive, ability to function with only one drive, easily recoverable data, high redundancy, and very fast on reads. It also does not need to be scalable and uses the minimum number of drives (two) for RAID 1. Confirm the configuration and close the primary array.
Secondary Array:
Drag and drop two 300 GB SSD hard drives to the secondary array bay. Open the secondary array and select RAID 0 as the RAID level. RAID 0 provides the best write performance and uses the minimum number of drives (two) for RAID 0. It also provides a total space of 600 GB (300 GB x 2), which meets the requirement.
Confirm the configuration and close the secondary array. You have completed the configuration of the storage arrays.

Before attempting to resolve the issue, it is important to first determine the cause or probable cause of the issue, so that a plan of action can be developed. In this case, the fact that the retention policy was updated shortly before users first noticed the issue suggests that this could be the cause of the issue. The systems administrator should investigate this further to determine if this is indeed the cause of the email server issue.

APIPA (Automatic Private IP Addressing) is a feature of Windows that allows devices to automatically assign themselves an IP address if they cannot obtain an IP address from a DHCP server. However, APIPA addresses are not routable, which means that devices with APIPA addresses cannot communicate with devices outside of their local network.
DNS (Domain Name System) is a service that translates domain names into IP addresses. This is necessary for devices to access websites and other resources on the internet.
SMB (Server Message Block) is a protocol that allows devices to share files and printers.
In this case, the technician needs to configure the router to use DHCP so that devices can obtain IP addresses from the router. Once devices have IP addresses, they will be able to access the internet through the router's DNS server.