I was recently looking to backup my emails from a Microsoft Exchange server, but I noticed that my older emails were missing. Scrolling down, it appeared that I could only see emails from the last year. If I searched within Outlook I could eventually find the older emails, but they were missing from my inbox. My assumption was that this was an Outlook setting rather than an issue with the server, and research proved me correct. Luckily, this can be fixed quite easily.
First, in Outlook, go to the File menu, and under Info choose the required account. Then, click Account Settings and select “Account Settings…”
Next, select your email account and then click “Change…”
Finally, under “Download email for the past:”, move the slider all the way to the right and then click Next.
Outlook should now retrieve all your old emails, so you can archive them or do as you wish!