Which statement describes the impact of setting the User inactivity expiry time option to 90 days?

Refer to the exhibit.

Which statement describes the impact of setting the User inactivity expiry time option to 90 days?
A . IBE user accounts will expire after 90 days of inactivity, and must register again to access new IBE email message
B . Registered IBE users have 90 days from the time they receive a notification email message to access their IBE email
C . After initial registration, IBE users can access the secure portal without authenticating again for 90 days
D . First time IBE users must register to access their email within 90 days of receiving the notification email message

Answer: A

Explanation:

Reference: https://docs.fortinet.com/document/fortimail/6.4.0/cli-reference/813529/system-encryption- ibe#config_3733402351_2450215