Welcome, I am Cory. Thank you for asking your question today.
Was the email accessed by someone in another location?
Do you access Outlook on the web or in the program?
How many devices is the email account connected to?
Let me know when you would like to continue by replying in the box below.
Can I connect remotely and see if someone is accessing your account and fix the issue?
I do not believe that the phone is the issue.
DO yo have many sub folders in Outlook?
I understand that. Also, Outlook can use many IMAP connections. Some people have switch to Thunderbird because the IMAP connections can be limited to 1.
Is this a Gmail account correct?
You are using Gmail on Outlook?
Login to the Gmail account on the computer at http://www.gmail.com
Scroll down to the bottom and at the bottom right click on Details link
Click on Sign Out of all other web sessions
You will be signed out
Sign out of the web sessions
Sorry, I had to step away from the computer.
We can work on it later.
What I suggest is that you try switching the email to Thunderbird on the computer and you can limit the connections to 1. This may solve the issue, as Outlook uses many.
It would be a process, but you can download it for free and setup the email accounts in it.
It would be Outlook.
I would try signing out of it on your phone email program and sign back in and see if it helps.
What phone do you have?
What App do you use?
The Gmail app?
Is it the default account?
You are going to have to disable it, but it might remove the emails on the phone.
Go into the settings, then the apps.
Find the Gmail app and click on disable.
Once the app is disabled, it will no longer be connected.
You can enable it the same way.
Let me know if this fixes it.
How did it work?
Please keep me up-to-date and don't forget to rate my answer with the stars above.