Defer The Change

These changes were to be enforced by 30th September 2022, but Microsoft have deferred the enforcement to 31st December 2022.

Basic Authentication Deprecation in Exchange Online – September 2022 Update

Microsoft will now allow a one-time deferment to allow basic authentication. The article describes the announcement and the steps to defer the enforcement.

Realisable & IMan

Realisable will be releasing (in the coming days as of 21st Aug 2022) a new version (v5.1) of IMan which will fully support OAuth authentication for SMTP and POP3 mailbox functionality.

We were to release this earlier, but delayed the release once we received notification about the Microsoft change.

You will be required to upgrade to the latest version. Due to the database and architectural changes we will not be back porting to prior versions.

In the meantime

To ensure that you can still use Office 365 with Basic authentication ensure that you follow the article link above.