I jusrt want to secure it with a password, so no one else would have access to it. Please refer to the following additional support article: Hello Terry, Thank you for letting us know.
I have added a link to the guide on how to subscribe to the IMAP Inbox, on the bottom of this article. If you have set up forwarding, you will be checking the email accounts that the mail is forwarded to. The Outlook SMTP connection should not require that since it is a client connecting to a server, I wouldn't think.
The Lost and Found folder contains any folders and items recovered by the repair tool that Outlook can't place in their original structure.
Create new data file You can create a new Outlook Data File and drag the items in the Lost and Found folder into the new data file.
The Inbox Repair tool checks the Outlook data files on your computer to see if they're in good shape.
If you're using a Microsoft Exchange account and your offline Outlook Data File (.ost) is missing items, you can safely delete the file.
Please let us know if you had any further questions at all.
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To be exact, I have created a new profile and kept it to download but still the problem persists. I can assure there's no issue as other users are able to communicate without any issues. If you feel the issue is not resolving itself I would recommend checking out the Outlook Support and Recovery Assistant Here: https://configure.office.com/sara/Setup Consider changing how much email you are downloading as well to keep offline.
Start low - and you can increase it as you validate it if you need too.