When Emails are missing from the AOL mail account. It means, something is wrong with the user account or password. here are the guide to get that fixed.
1. First of all, you need to check the mail filters and forwarding settings. make sure that the account forwarding is working fine.
2. Sometimes, AOL mail missing emails because of the server problems. so you need to make sure that the AOL mail servers are working fine.
3. If AOL mail gets disappeared from the phone. you need to remove the account and then re-add the mail account.
Once you will make these changes into the AOL mail account, you need to visit askprob blogs. there you will find the complete guide.