I’ve been using Thunderbird with outlook.com / office 365. So basically Thunderbird with Exchange via IMAP.

It’s been working relatively well. One little annoyance was that difference in naming folders:

• Trash vs. Deleted Items
• Junk vs. Junk Email
• Sent vs. Sent Items

The Junk and Sent folder can be renamed in Thunderbird via the GUI but remarkably renaming of the Trash folder is not supported.

I accidentally stumbled upon a link explaining how to change the naming of the trash folder in Thunderbird:

• http://kb.mozillazine.org/IMAPTrashfolder
• https://www.mat.ethz.ch/services/itsupport/usersguide/documents/mailclients/thunderbirdfolder_mappings