If you've completed the recommended troubleshooting steps and the issue appears to be related to Microsoft 365 or Office, your Microsoft 365 Administrator should open a support request with Microsoft.
Open a Microsoft Support Request
Sign in to admin.microsoft.com as a Global Administrator.
Select Help (?) → Support → New service request.
Describe the issue (for example, "Office add-ins failing to load or deploy- ExtendInsights Data Connector for Excel.").
Include:
Microsoft Office/Excel version
Number of affected users
Error messages or screenshots
Submit the request using your preferred contact method - chat is usually fastest.
Alternatively: support.microsoft.com/contactus → select Microsoft 365 → Contact Support.
Microsoft Can Assist With
Microsoft AppSource and Office add-in deployment
Centralized add-in deployment
Microsoft 365 tenant configuration
Service Health Incidents
Exchange Online configuration affecting Office add-ins
Need Help?
For issues specific to ExtendInsights or ExtendSync functionality, contact CloudExtend Support.
For Microsoft 365 or Office platform issues, Microsoft Support is the appropriate point of contact.