Hi @Peter Glass ,
Welcome to our forum!
I use the online version of Microsoft Outlook for emailing.
Are you using Outlook for web or New Outlook for Windows?
And what's your account? An Outlook.com or anything else?
If you are using an Exchange online account, agree with simo-k, you can use the Exchange Online Archiving feature when your administrator enables the feature for you. More information:
Hope the above help!
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