Import-Module ExchangeOnlineManagement
Connect-ExchangeOnline -UserPrincipalName user@domein.be
Set-Mailbox
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Outlook 2016 / Outlook 2019 / Microsoft 365
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\PST
The following 2 new DWORD values must be created or set;
WarnLargeFileSize
Don’t set this higher than 4090445042 (decimal) or f3cf3cf2 (hexadecimal)
MaxLargeFileSize
Don’t set this higher than 4294967295 (decimal) or ffffffff (hexadecimal)
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