Intermittent SharePoint Connection Authentication Issue in Microsoft Fabric

[SanyamSingh2119]

Hi Team,

I am experiencing an intermittent issue with a SharePoint connection in Microsoft Fabric.

Issue Description
1-I have a SharePoint connection configured in Fabric using OAuth 2.0 authentication.
2-The connection initially works without any issues, and I am able to create and use Lakehouse shortcuts pointing to files and folders in the SharePoint site.
3-After some time (typically within a week), the connection starts failing.

Errors Observed-
1-While accessing existing shortcuts:

ArtifactConnection_InaccessibleDatasource
DMTS_EntityNotFoundOrUnauthorized

2-While attempting to create a new shortcut using the same connection:
PowerBINotAuthorizedException

Current Behavior-
1-I can access the SharePoint site and files manually using my account.
2-The connection continues to appear healthy under Manage Connections and Gateways.
3-The issue affects only the Fabric connection.
4-Recreating the connection or re-authenticating through Edit Credentials immediately resolves the issue.
5-After re-authentication, shortcut creation and access work as expected again.

Impact
This requires periodic manual re-authentication of an otherwise healthy SharePoint connection, impacting the stability of SharePoint-based Lakehouse shortcuts and ingestion processes.
Could you please help investigate why the SharePoint OAuth connection requires repeated re-authentication despite remaining active and accessible from the Fabric connection settings page?
Thank you for your assistance.

[SanyamSingh2119]

No the issue is not due to token expiry beacuse we have a similar connection to the sharepoint in another project but it does not tell us to re-autheticate the credential after one week, so the issue is something else

[v-dineshya]

Hi @SanyamSingh2119 ,

It appears this issue might require deeper investigation from the Microsoft  Fabric support team. I recommend opening a Microsoft support ticket so they can trace the issue. To raise a support ticket for Fabric and Power BI, kindly follow the steps outlined in the following guide:

How to create a Fabric and Power BI Support ticket - Power BI | Microsoft Learn

Regards,

Dinesh

[v-dineshya]

Hi @SanyamSingh2119 ,

We are following up to inquire whether you have raised the support ticket. If you have already done so, we kindly request you to share your feedback regarding the issue raised.In case a solution has been provided, we would be grateful if you could share it with the community. This will assist others facing similar challenges and benefit the wider community. If you need any more assistance, please feel free to connect with the Microsoft Fabric community.

Regards,

Dinesh

[v-dineshya]

Hi @SanyamSingh2119 ,

Thank you for reaching out to the Microsoft Community Forum. could you please try the proposed solutions shared by @Parchitect  and @Omkar_1712  ? Let us know if you’re still facing the same issue we’ll be happy to assist you further.

Regards,

Dinesh

[Parchitect]

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Hi @SanyamSingh2119,

Since re-authenticating the Fabric connection immediately restores both existing shortcut access and new shortcut creation, this looks more like a stored credential / OAuth token refresh issue than a SharePoint folder permission issue.

One thing I would check is the shortcut connection itself from the Lakehouse side: Lakehouse → Settings → Shortcut connections. OneLake shortcuts use shared cloud connections, and these can be reviewed or replaced there if a shortcut connection becomes broken or requires action.

Also, SharePoint/OneDrive shortcuts support different authentication methods, including Organizational account, Workspace identity, and Service principal.

If the current connection uses an interactive OAuth/Organizational account, I would review Entra ID Conditional Access, MFA/sign-in frequency, password/session changes, or token revocation events, as these can force re-authentication even when the SharePoint permissions themselves are still valid. 

For a more stable production pattern, I would test creating a new SharePoint shortcut connection using Service principal or Workspace identity, if supported in your environment. If the issue only happens with the OAuth/Organizational account connection, it is likely session/token-policy related.

If it also happens with Service principal or Workspace identity, I would raise a Microsoft support ticket with timestamp, correlation ID, connection ID, and affected shortcut details.

[Omkar_1712]

Hello @SanyamSingh2119,

Based on your description, it doesn't appear to be a SharePoint permissions issue, since re-authenticating the connection immediately restores access.

A few things I'd recommend checking:
* Verify whether the OAuth access token or refresh token is expiring and not being renewed correctly.
* Confirm that your organization's Conditional Access or MFA policies aren't forcing periodic re-authentication for SharePoint connections.
* Check whether the account used for the connection has experienced any password changes or credential updates.
* Review the Fabric Capacity and Service Health pages to see if there are any known issues related to SharePoint connections.

Since recreating or re-authenticating the connection consistently resolves the problem, this may indicate a token refresh issue or a service-side limitation rather than a configuration problem.

If the behavior is consistently reproducible, I'd recommend opening a Microsoft Fabric support ticket and providing the correlation ID and timestamp from the failure.

This will allow the product team to investigate whether the connection's OAuth token refresh is failing.

Best regards,
Omkar Shinde
Microsoft Fabric Enthusiast | Power BI Consultant

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