Small and medium business | Business Central, N...

Business Central Excel Add-in failing to authenticate

(0) Share

Report

Posted on by LV-06051402-0

Multiple users are currently experiencing authentication errors when trying to launch the BC excel add-in: Error . Please sign in with a user account associated with the server: https//exceladdinprovider.smb.dynamics.com error see https://aka.ms/msal.js.errors#timed_out for details.

Has anyone come across this and found a way to resolve the error?

Categories:

Dynamics 365 Business Central

I have the same question (0)

All responses (2)

Answers (0)

Sort by

Suggested answer

Valentin Castravet 32,621 Super User 2026 Season 1 on at

Like (1)

Report
Copy link

Link copied!

Try signing out first, then click the Sign In button again.

Even though it is asking you to sign in you may still be signed in which could be interfering with the new sign-in attempt.

Click the person icon in the upper-right corner, then click on Sign Out. After that, click the Sign In button again.

That seemed to fix it for me.

Valentin Castravet
Work: Zander ERP Services
Blog: Dynamics 365 Business Central Insights
LinkedIn: www.linkedin.com/in/valentin-c-0500a247/

Was this reply helpful? Yes No
Suggested answer

Gregory Mavrogeorgis 1,051 Super User 2026 Season 1 on at

Like (0)

Report
Copy link

Link copied!

Hi,

Yes, this is a known one — caused by a recent MSAL update that's hitting the Excel add-in with timeouts and sign-in loops. Quick things to try:

- Clear the Office identity cache: File > Account > Sign out, then close all Office apps and sign back in.
- Clear the Wef cache: `%LOCALAPPDATA%\Microsoft\Office\16.0\Wef` — delete the contents while Office is closed.
- In *Access work or school* (Windows Settings), make sure only the BC tenant account is listed; remove any extras.
- Reinstall the add-in from the Office Store.

If it still fails, check the Microsoft Entra app registration redirect URIs match the SPA entry `https://az689774.vo.msecnd.net/dynamicsofficeapp/v1.3.0.0/*`. There's an active community thread on this if you want to follow it.

If you have found this helpful please mark it as verified.

Gregory Mavrogeorgis
Work: GMSOFT Limited
Blog: Inside Business Central
LinkedIn: www.linkedin.com/in/gregorymavrogeorgis

Was this reply helpful? Yes No