Now your Thunderbird should be synchronizing with your Office 365 Exchange Online now. If you would like TbSync to automatically synchronize for every several minutes, input the periodic interval time in the “Periodic synchronization (in minutes)” filed. Hit the “Synchronize now” button and it will start to synchronize your calendar and contacts from the Exchange Online service. You may also choose to synchronize your To-do lists too. Last, enable the synchronization status for the account by enabling “Enable and synchronize this account” and choose the “Available resources” for the Contact/Address Book and the calendars. If everything works well, the new Exchange Online account will be added. Input the account info for your Office 365 account.Ĭlick the “Autodiscover settings and add account” button. The “Adding an Exchange ActiveSync account to TbSync” dialog will show. So, migrating Thunderbird mailboxes to Office 365 would first require converting all the data into a supported format such as Portable Storage Table (PST) or EML.
The click the “Account actions” -> “Add new account” -> “Exchange ActiveSync” as follows. Firstly, Office 365 doesn’t support MBOX file type that is used in Thunderbird for storing mailboxes-comprising emails, attachments, contacts and calendars, etc. First, from the menu “Tools” -> “Add-on Preferences” -> “TbSync”, open the TbSync configuration window as follows.