According to Microsoft support these are the correct settings as of 2024-06-16

Location: HKEY_CURRENT_USER/Software/Microsoft/Office/16.0/Outlook/PST

Dwords 32bit;

WarnLargeFileSize

4090445042(decimal) or f3cf3cf2(hexadecimal)

MaxLargeFileSize

4294967295(decimal) or ffffffff(hexadecimal)