Every mailbox gets its own pane, its own cache and its own sync.
Open your Inbox, the help desk and billing side by side, in tabs and split panes. Unread counts and sync status are per mailbox, and one All Inboxes view merges them.
- Add a shared mailbox in seconds, with no profile rebuild and no restart
- Choose how many months each mailbox keeps offline
- Sync or rebuild one mailbox without touching the others
- Send as the shared mailbox; the copy lands in its Sent Items, not yours
- Saved views: name a layout of tabs and panes, then switch to it from the folder pane
- Settings sync: rules, tags, smart folders, auto labels and saved views follow your Microsoft 365 account to your other computers. Mail never leaves your machine for this, and you can turn it off





























