Share via

Microsoft Dynamics Add-In for Excel sign-in not persisting

Brent Hawthorne 0 Reputation points
2026-06-22T14:17:51.4133333+00:00

We have users who raised an issue that the Excel add-in for D365 stopped persisting logins in early May, which is causing them problems with desktop automation flows. I see the same behavior. There isn't an error, just every time the file is opened they have to click Sign In.

Is there a resolution for this? Is this the planned behavior going forward?

Should all be current versions:

Add-in version - 7.1.26096.01

Excel - M365 current and Current (Preview). 2606

Microsoft 365 and Office | Development | Other
0 comments

1 answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Michelle-N 18,185 Reputation points Microsoft External Staff Moderator
    2026-06-22T14:57:12.9933333+00:00

    Hi @Brent Hawthorne

    Based on the information you provided, I understand that your users have been hit by an incredibly disruptive issue where the Microsoft Dynamics 365 Office Add-in (version 7.1.26096.01) stopped persisting login sessions. Even though no explicit error codes are thrown, the add-in completely drops its credentials every single time an Excel file is closed, forcing users to manually click "Sign In" upon reopening. This broken single sign-on (SSO) behavior is severely breaking your headless desktop automation flows (RPA/Power Automate Desktop) that rely on background data refreshing.

    Based on my research, the issue stems from a major platform-wide update to the Microsoft Authentication Library (MSAL) framework rolled out around May 1, 2026. Please refer the following thread:

    https://community.dynamics.com/forums/thread/details/?threadid=7888e38f-ec49-f111-bec7-002248240f92

    Please let me know more information.

    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click ""Comment"".

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

    Was this answer helpful?

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.