Migration on PeteMahon.net

Migrating OneNote to Joplin

Wed, 29 Apr 2026 10:00:00 +0400

Getting your notes out of OneNote

Getting data out of OneNote is the part of this migration where Microsoft makes you work for it. Unlike OneDrive - where the desktop client will happily sync the entire tree to disk on demand - OneNote has no equivalent “export everything” command. The native export options are notebook-by-notebook, section-by-section, and the formats they offer (.one proprietary, .docx, .pdf, .mht) are either useless to Joplin or lossy on the way through. The route I took was OneNote desktop on Windows exporting to .one files, then Joplin’s native OneNote import on the other side.

Moving OneDrive Files to Proton Drive

Tue, 28 Apr 2026 03:30:00 +0400

Getting the OneDrive tree onto disk

Getting every file out of OneDrive and onto local disk is the foundation step; Proton Drive’s client needs to see real files, not placeholders to files only in the cloud. The OneDrive client allows you to set your top folders to Always keep on this device, which will pull all your files down. If you have huge local diskspace, you might select them all at once for downloading.

Migrating Multiple M365 Mailboxes to Proton with One License

Mon, 27 Apr 2026 08:00:00 +0400

If you’ve arrived here from a search engine looking specifically for the shared-mailbox question, the short version is: yes, you can migrate two M365 mailboxes onto one Proton license, and you do it by temporarily moving the license between users in M365 rather than buying a second seat anywhere. The longer version assumes you’ve already done the basic Proton setup - both custom domains added and verified, MX records pointing at Proton, your primary mailbox already imported via Easy Switch. If any of that isn’t true, the previous post covers the standard single-mailbox flow first.

Migrating Your Inbox from Microsoft 365 to Proton

Sun, 26 Apr 2026 17:00:00 +0400

This is where data actually moves. Post 3 got Proton set up on your custom domain and your DNS records trusted; this post is the cutover itself - pulling mail across from M365. If you’ve arrived here from a search engine, note that the earlier posts aren’t prerequisites if you already have Proton on a custom domain with MX records created but not yet live.

Before you start

So far, your incoming email should have started appearing in your Proton mailbox, and you should have been able to send emails from Proton as well. Let’s just double-check you have everything in place.