Backup fails with the following errors:
03/31/2025 22:00:03 : Exception occurred - Reason: Object reference not set to an instance of an object.
03/31/2025 22:00:03 : Reason: Code: generalException
Message: An error occurred sending the request.
When checking the Plug-in for MS 365 the user list for certain apps, for example, OneDrive, will not open.
These errors suggest the plugin is trying to access something (like a user object or OneDrive resource) that either no longer exists, isn’t accessible, or has a broken reference. This is usually caused by expired or misconfigured Tenant Credentials or missing permissions in Azure AD.
Go to Configuration > Manage Clients
Locate and select the NetVault client where the M365 plug-in is installed (e.g., NVSRV1)
Right-click the Plug-in for Microsoft 365 node or use the gear icon/menu
Choose Configure
In the Add Tenant / Edit Tenant screen:
Choose Tenant Credentials (since the original config likely used App ID and Secret)
Enter the following values:
Application Domain:
Typically your verified Microsoft 365 domain (e.g., n28s.onmicrosoft.com)
Application ID:
Found under Azure Active Directory > App registrations > Your App > Overview
Application Password:
This is your client secret. If expired, generate a new one under: Azure AD > App registrations > Your App > Certificates & secrets > New client secret
(Optional) Enable Teams Backup:
Check Enter Global Administrator Credentials
Use UPN format: adminuser@n28s.onmicrosoft.com
This account must be:
A Global Administrator
A member/owner of Teams
Click OK to save the updated configuration
Return to Manage Sets > Plug-in for Microsoft 365 > OneDrive > Users
The user list should now populate correctly if credentials are valid and permissions are intact.
