
Follow the steps below to install Owl, purchase your license, and configure your ABWE email account.
Step 1: Open Thunderbird and click the gear icon in the lower-left corner.
Step 2: On the Settings page, click Add-ons and Themes in the lower-left corner.
Step 3: In the Add-ons Manager, click the search box, type Owl, and press Enter.
Step 4: Click the green Add to Thunderbird button next to Owl for Exchange.
Step 5: Click Add on the confirmation dialog to complete the installation.
Step 6: In the Add-ons Manager, click the wrench icon next to Owl for Exchange.
Step 7: In the window that appears, click Purchase License.
Step 8: Select your preferred payment method (credit card or PayPal) and complete the purchase.
Step 9: Close and reopen Thunderbird to ensure Owl initializes properly.
Step 10: Click the gear icon in the lower-left corner, then click Account Settings.
Step 11: Click New Account and select Mail Account.
Step 12: Choose Exchange – Requires Add-on and click Continue.
Step 13: Enter your name and ABWE-issued email address, then click Continue. Complete the authentication prompts until the Finish button appears.
Step 14: To verify the account is configured correctly, right-click your email address in the left panel. The bottom of the context menu should show Owl for Exchange. If it does, your mailbox is set up properly and you should have access to email, calendar, and contacts.
Step 15: Return to Account Settings (gear icon → Account Settings). You will see a list of all accounts Thunderbird is configured for.
To identify which account is using Owl, click Outgoing Server and check that the Authentication method is OAuth2 — that is the correct account to keep.
Step 16: For any other ABWE accounts that are not using Owl, click the account's email address and then click Delete to remove it.