Export Outlook messages to MSG files

Compliance wants copies of all correspondence with one client saved to a project folder, each email as its own file with attachments included.

MSG format is acceptable to them. What is the fastest way to get a few hundred messages out?

MSG is the one format Outlook exports in bulk with zero tooling: drag and drop.

1

Search or filter the folder down to the client's messages, for example from:client@company.com in the search box.

2

Select the results with Ctrl+A, or Ctrl+click a subset.

3

Drag the selection into the project folder in File Explorer. Each message writes out as a .msg named after its subject, attachments embedded inside.

4

Spot check a couple by double clicking, they open in Outlook with attachments openable from within.

Three practical limits. Identical subjects collide, Windows keeps the first and Explorer may silently drop the rest in large drags, so drag in chunks of 50 or so and watch the counts. Deep project folders hit the 260 character path limit since long subjects become long filenames, keep the target folder near the drive root. And MSG only opens where Outlook is installed, if compliance ever needs them readable without Outlook, a converter can turn the folder of MSG files into PDF or EML later.

Dragged out 412 messages in chunks and counts match the search results. Two subject collisions renamed by hand. Compliance folder done.