download the new version Mozilla Thunderbird 115.3.1

If a new Thunderbird profile works, then for most people it is best to continue using the new profile. Please try signing in with a new Thunderbird profile (see Profile Manager - Create and remove Thunderbird profiles for instructions on how to create a new profile).An account worked on Thunderbird 102.6.1, but does not work on 102.7.1 or later.Per Microsoft documentation, administrators should visit ' /adminconsent?client_id=9e5f94bc-e8a4-4e73-b8be-63364c29d753' and grant the following permissions in order to authorize Mozilla Thunderbird: “”, “”, “SMTP.Send” and “offline_access” You must ask your administrator to authorize Thunderbird - approval must be done, but only once. A screen that indicates IT administrator approval is required for the app.As a result, we have been forced to make configuration changes to Thunderbird, which may have side effects for users.įor, , Microsoft 365 (formerly known as Office 365 and often abbreviated as “o365”) or other Microsoft-hosted email services, you may see the following issues: Microsoft have also changed the way they classify certain clients, and Thunderbird’s previous OAuth setup does not properly qualify as a desktop client. In addition, there are some restrictions on SMTP that are not currently understood. For new accounts, SMTP always starts disabled. In some cases, SMTP authentication has been completely disabled.Deprecated basic authentication (username/password), and is instead now requiring OAuth authentication.

Microsoft has instituted the following changes : As of April 2023, this information is still evolving and subject to change. This article describes these changes and how to adjust to them. Microsoft has made some changes to authentication for their hosted email services for business and academic accounts. Microsoft OAuth Authentication and Thunderbird in 2023

Download the new version Mozilla Thunderbird 115.3.1