Troubleshooting Microsoft 365 problems

• The remote server returned an error: (401) Unauthorized
• The request failed with HTTP status 403
• Microsoft .NET version 4.8 or above must be installed
• Windows PowerShell 5.1 or later must be installed
• The application client secret has expired
• MachineKeys folder is increasing in size

The remote server returned an error: (401) Unauthorized

Cause: This issue is caused when the certificate is not uploaded to the Azure portal.

Resolution:

• Log in to the Azure AD portal.
• Click Azure Active Directory from the left pane.
• Choose App registration under the Manage section.
• Select All applications.
• Click on the application which is configured in RecoveryManager Plus
• Click Certificates & secrets from the left pane.
• In the Certificates section, click Upload certificate and upload the CER file of the certificate which you had applied in RecoveryManager Plus when configuring the tenant.
• If the issue still persists, contact support@recoverymanagerplus.com.

The request failed with HTTP status 403

Cause: This issue occurs when the necessary API permissions were not provided for the application.

Resolution:

• Follow the steps listed here
• If the issue still persists, contact support@recoverymanagerplus.com.

Microsoft .NET version 4.8 or above must be installed

Cause: This error occurs during tenant configuration in Exchange Online if the .NET framework version used is 4.8 or below. You will not be able to perform any operations in this case.

Resolution:

• Upgrade to .NET version 4.8 or above.
• Once upgraded, restart the system and try performing the operations again.

Windows PowerShell 5.1 or above must be installed

Cause: This error occurs during tenant configuration in Exchange Online if the PowerShell version used is less than 5.1

Resolution:

• Upgrade to PowerShell version 5.1 or above.
• Once upgraded, restart the system and try performing the operations again.

The application client secret has expired

Cause: This issue occurs when the application client secret has expired.

Resolution:

1. Log in to the Azure AD portal.
2. Click Microsoft Entra ID.
3. Go to Manage > App registrations > All applications.
4. Click the application that is configured in RecoveryManager Plus.
5. Click Certificates & secrets on the left pane.
6. Select Client secrets and click + New client secret.
7. Enter the description in the respective field, select the expiration period of the client secret, and click Add.
8. Copy the client secret from the Value field by clicking the icon.



9. Go back to RecoveryManager Plus and click Account Configuration in the top-right corner.
10. Select Microsoft 365 Tenant, click the icon next to the relevant tenant, and enter the new client secret.

11. If the issue still persists, contact support@recoverymanagerplus.com.

MachineKeys folder is increasing in size

Cause: This issue occurs when RecoveryManager Plus connects to SharePoint Online with an X.509 certificate. This leads to an increase in C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys folder size.

Resolution: Use Administrator rights to launch RecoveryManager Plus to connect to SharePoint Online with the uploaded certificate's thumbprint. If the issue still persists, please contact support@recoverymanagerplus.com.