Some users are having issues with their mailboxes not updating automatically, they need to click update folder every couple of minutes, send and receive doesn't work either for their mailboxes.
The users are Personal Assistants to 3 different senior managers and have access to those mailboxes and another generic rarely used contact-us mailbox.
only the old emails are shown, and new emails are not downloaded to Outlook, even though the status bar stated that the folder is updated.
The new contents such as emails, contacts, calendar items, tasks, notes and others are not updated and not downloaded even though user manually select “update folder” in order to pull the new data.
Try one of the following suggestions to fix the issue.