Coping with Outlook 365 E-Mail

Working with outlook can be challenging, there are a lot of things I really hate about it, but they aren't that hard to mitigate:

1. Thunderbird supports outlook inboxes with the new auth, which solves most of my problems (offline viewing, better search, better automation, etc.)
2. The Unmangle Microsoft ATP Safelinks add-on removes the crazy thing that is "Safelinks"

There is one unsolved problems as of now, which is calendar sync. Outlook does not support any open calendar protocol with two-way sync, I am currently trying to roll my own solution, but it's more difficult than expected and def. not ready yet.

Setting up Thunderbird with Office365:

This is based on this answer:

Create a new Account:

• Menu icon > New > Existing mail account
• Enter name, email address and normal password (same one you use to access via webmail)
• Select checkbox to remember password.
• click on 'Continue' and Thunderbird will attempt to get configuration settings. It will look for imap by default.

Server Settings - Remember - if you already created the account and modifying the Authentication Method then do both incoming IMAP and outgoing SMTP.

IMAP settings:

• Server name: outlook.office365.com
• Port: 993
• Connection Security: SSL/TLS
• User Name: full email address
• Authentication Method: OAuth2

SMTP settings:

• Description: full email address
• Server name: smtp.office365.com
• Port: 587
• Connection Security: STARTTLS
• User Name: full email address
• Authentication Method: OAuth2

When you attempt to connect to the server for the first time, you will get a pop up browser window from Microsoft asking for email address and normal password to allow Thunderbird access and then a token gets stored in Thunderbird in the same place as the normal passwords. From then onwards the token is used to access the server. You will re-login temporarily (every 30 days or so, I think?)