These are affecting clients with the following:
- Microsoft Dynamics GP (Great Plains) 18.3
- GP 18.2
- GP 18.1
- GP 2018
- GP 2016
- GP 2015
- GP 2013
- GP 2010
Before October 1, 2022, customers on older versions of Dynamics GP are likely to experience email outages. During the next few months, Microsoft may temporarily disable basic authentication on a client’s Office 365 to provide you with a notification that this change is coming in the year. At TruNorth Dynamics, your Microsoft Dynamics GP Partner, we should be able to assist you with a few workarounds available only until the October deadline.
Support for Multifactor Authentication (MFA) was added to Dynamics GP version 18.3 and enhanced in the latest release of Dynamics GP – version 18.4. It is a best practice to be on the newest version of Microsoft Dynamics GP, and this looming outage is a great reason why your business needs to upgrade.
When Basic Authentication is deprecated (October 1, 2022), your organization will need to be on a version of Dynamics GP where you can use Modern Authentication.
At TruNorth Dynamics, we are seeing increased cases where emails are beginning to fail from within Dynamics GP. This failure is especially true for older versions of GP (18.2 and older) that do not have Modern Authentication for Dynamics GP. As a result, the Microsoft Exchange team is temporarily disabling Basic Authentication to remind us that a more considerable change is coming.
The primary source of concern is Dynamics GP not being able to send emails via Microsoft Office 365 (Outlook) due to an update in the security parameters for Microsoft365 / Office 365 (Cloud email) and Exchange Online, which is phasing out SSL 2.0, TLS 1.0, and TLS 1.1 in favor of the newer and more secure TLS 1.2.