Change permissions 24 hours in advance:

Enable-OrganizationCustomization
New-RoleGroup -Name "Import-Export" -Roles "Mailbox Import Export" -Members "admin"

machtigingen > beheerdersrollen

Naam: Import-Export
Toegewezen rollen: Mailbox Import Export
Leden: admin

Nieuwe importtaak

Download AzCopy

Upload PST files:

azcopy copy "\\SERVER\PSTfolder" "https://sasurl.blob.core.windows.etc" --recursive=true

Old:

cd "%ProgramFiles(x86)%\Microsoft SDKs\Azure\AzCopy"

AzCopy.exe /Source:"\\SERVER\PSTfolder" /Dest:"https://sasurl.blob.core.windows.etc" /V:"c:\AzCopyUpload.log" /Y

Import mapping file:

Workload,FilePath,Name,Mailbox,IsArchive,TargetRootFolder,ContentCodePage,SPFileContainer,SPManifestContainer,SPSiteUrl
Exchange,,User.pst,User,FALSE,/,,,,

Full guide: Use network upload to import your organization's PST files to Microsoft 365