A modernized version of the EAS provider for TbSync for Thunderbird 153

First stable release of the Exchange ActiveSync provider for TbSync v5. Requires Thunderbird 153 or newer.

Like TbSync itself, the goal of the rewrite is to be a modern WebExtension: the setup and settings dialogs are HTML instead of XUL, and the only legacy code left is what migrates accounts from earlier versions.

Before you update

Update all parts together. TbSync v5.2.* only works with provider add-ons from the modern v5.2.* family.

Accounts from earlier versions get their settings migrated, but all resources are locked and cannot be migrated. Back up pending data, then disconnect and re-connect the account to start fresh.

Disconnecting deletes that account's local calendars and address books.

New

• ActiveSync up to 16.1 - initial support by Jarek Polok, recurring events by Niel Buys
• Attendee availability (free/busy) when inviting someone - #189
• Global Address List as a searchable, read-only address book - #344
• Formatted calendar notes survive in both directions - #347, #95
• Many issues fixed around recurring events - #334, #342, #343
• Subscribed calendars keep the right owner - #333
• An end-to-end test suite that runs against real servers, Microsoft 365 and Kopano/Z-Push, so every sync path is exercised against both before a release

Fixed

• A folder stuck on "needs to be synchronized" - #336
• Sync failing with "unknown error", and no detail when the server rejected an item - #335, #319
• Provisioning failures, including Tencent Exmail - #337, #315
• Task lists offered when creating an event - #341
• All-day events shifting by a day
• Recurring events authored in another time zone drifting by an hour around daylight-saving changes
• A rescheduled or cancelled occurrence of a recurring event not updating - #317
• Re-authenticating an account, and recovering a username/password account after an authentication failure - #321
• A server-initiated resync duplicating every item in a folder
• Refresh tokens rotated by the server not being kept
• Several data-loss bugs in contact handling
• The add-on no longer asks for the "management" permission