How exactly does it behave and how to keep all folders collapsed/expanded during and between Outlook sessions?Note: As the folder state is being saved when you close Outlook, Outlook shutdown issues can prevent it from being saved so the folder state isn’t remembered when you start Outlook again. To keep the mailbox collapsed even when a new message is being delivered, make sure that your Inbox and other folders that receive email (for instance by a rule) have been added to your Favorites list.Outlook shows the message “we didn’t find anything to show here.” when looking in a folder that shows unread items.The views in outlook can become unresponsive causing it to not display the emails.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.
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In general, Outlook will indeed display which folder it is currently synching in the Status Bar.
When it is not, it usually is synching additional mailbox information and data such as the folder hierarchy, Views or Quick Steps.
To set your default startup folder; IMAP folders will always start collapsed and will remain collapsed even when a new message is being delivered to any of its folders.
Setting the default startup folder of Outlook to the Inbox folder of an IMAP account will expand the folder list on startup but could increase Outlook startup time.