Who is this article for?

Users who want to troubleshoot the SharePoint authentication error.

No elevated permissions are required.

When using Mail Manager with SharePoint, authentication errors can sometimes arise. This article outlines common troubleshooting steps and provides resources to address these issues effectively.

1. Issue

SharePoint authentication errors may occur when filing emails in Mail Manager due to several factors, such as outdated credentials or compatibility settings in Outlook. Resolving these issues typically involves verifying settings and resetting authentication tokens.

2. Resolution

2.1. Refresh your SharePoint credentials

• Close Outlook.
• Navigate to the local directory of MailManager at %localappdata%\28hands\Mail Manager.
• Delete the file named mmAuthStore.
• Restart Outlook and wait for the system to prompt you to re-enter your SharePoint credentials.
• Log in and test filing emails to ensure the issue is resolved.

3. External resources

If re-authenticating the SharePoint token fails or the issue continues, see the detailed resource below:

• SharePoint Auto Discovery With Graph Authentication – Mail Manager (Comprehensive guide on resolving Graph Authentication issues for SharePoint.)