I have set the expiration period as 4 hours. However the recipient is unable to view the email right from the time they received it.
The Nightfall admin has revoked access to the recipient from the Nightfall encryption event. Contact your Nightfall admin to restore the access.
I have not configured any Encryption settings on the email. However, the recipients see that the email has an expiration time period.
Your Nightfall admin has configured Encryption settings in an encryption policy. So, even if you have not configured any encryption settings, the policy automatically implements the encryption settings enforced by your Nightfall admin.
I set the expiration time as 2 days. However, the recipient said that they were on vacation for those 2 days and is now requesting access to the expired Email.
You can restore access to a sent email which is expired. Just go to your sent emails list. Open the required email, and set a new expiry date for the email. The recipients can now access the email until the new expiry date is reached. You can also disable expiration totally. In the case, this recipients can view the Email forever, until you enable expiration again.
