how to fix my microsoft excel?

Question

how to fix my microsoft excel?

Dominique Nuevo 0

why cant i open ng microsoft excel? what is the possible way to open it?

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2 answers

Your answer

Answer 1

Dear @Dominique Nuevo,

I hope you’re having a good day

Your inability to open Excel may be linked to an ongoing connectivity issue affecting multiple Microsoft 365 services.

According to Microsoft's notification (Incident ID: MO1550821), users may be unable to connect to or access multiple Microsoft 365 services, including Exchange Online, Microsoft Teams, SharePoint Online, Microsoft Copilot, and Microsoft Defender XDR. Because Microsoft 365 for Education relies on cloud connectivity to verify your license and load files, this service degradation can prevent Excel from launching properly.

Microsoft has identified that the affected infrastructure is experiencing elevated load across multiple regions and is currently restarting, repairing, and redirecting traffic to restore capacity. The incident is classified as Service Degradation, and Microsoft is actively working to mitigate the issue.

User's image

Possible ways to open Excel on Windows in the meantime:

Open in Safe Mode: Press Windows Key + R, type excel /safe, and press Enter to bypass startup add-ins or glitches.
Disconnect from the Internet temporarily: Turn off your Wi-Fi/Ethernet and launch the Excel desktop app. This bypasses the hanging cloud sign-in check caused by the outage (you can reconnect once Excel opens).

Since you are using an Education account, please reach out to your school's IT administrator to monitor the status. If you don't know who the admin is in your organization, you can find guidance here: How can I find my Microsoft 365 admin? - Microsoft Support

If you have Microsoft 365 administrator privileges, you can check the details directly in the Microsoft 365 Admin Center:

Go to Health > Service Health.
Search for Issue ID: MO1550821.
Select the issue and expand the details to review the latest updates, affected services, impact, and remediation information.

I'll continue to monitor this case and let you know if there is any update.

Warm regards,

If the answer is helpful, please select "Yes, accept answer". If you have any questions or new updates, please feel free to comment below.

Liora 3,690 Reputation points Independent Advisor

2026-11-13T10:27:49.84+00:00

Hi,

Latest Update (Nov 13, 2026 – Incident MO1550821):

Microsoft's recovery actions are progressing in phases, and some accounts and regions are already regaining normal access to Outlook and Microsoft 365 services.

What to try now: Please refresh Outlook on the web or restart your Outlook desktop app periodically over the next hour, as your mailbox may reconnect as capacity is restored to your region's servers.

No lost emails: Microsoft has prioritized queue processing and extended the email timeout window to 48 hours, so any emails sent to you during the outage are safely preserved and will arrive automatically once your account reconnects.

Next official update: Microsoft will release the next status update by 18:00 GMT+7 (11:00 UTC) today.

I will continue monitoring until Microsoft officially confirms full resolution. Once your access is back or if you found this status update helpful, please consider selecting "Yes, accept answer" so other affected users can more easily find the latest information here.

Answer 2

Start Excel in Safe Mode first; if it opens, disable conflicting add-ins, and if it still does not open, run Microsoft 365 Online Repair.

1. Try Excel in Safe Mode

Safe Mode starts Excel without most add-ins and customized startup settings.

Press Windows key + R.
Enter:
```
   excel /safe
```
Select OK.

If Excel opens, continue with the add-in steps below. If it does not open, skip to Online Repair. Microsoft recommends this safe-mode decision path for startup, hanging, and crashing problems.^1^

2. If Safe Mode works, disable add-ins

In Excel, select File → Options → Add-ins.
At the bottom, set Manage to COM Add-ins.
Select Go.
Clear every checkbox and select OK.
Close Excel and open it normally.

If Excel now opens, enable the add-ins again one at a time, restarting Excel after each one. The add-in enabled immediately before the problem returns is the likely conflict.^1^

3. If Excel will not open in Safe Mode, repair Office

Save and close any other Office applications first. Repair affects the complete Office suite, not only Excel.

Windows 11

Right-click Start → Installed apps.
Find Microsoft 365 or Microsoft Office.
Select the three dots → Modify.
Choose Online Repair → Repair.
Complete the prompts, restart the computer if requested, and test Excel.

Windows 10

Right-click Start → Apps and Features.
Select Microsoft 365 or Microsoft Office → Modify.
Choose Online Repair → Repair.
Complete the prompts and test Excel.

For an MSI-based Office installation, choose Repair → Continue instead. Online Repair is the more complete Click-to-Run repair option.^2^

4. If repair does not resolve it

On Windows 10 or later, run Microsoft’s Excel check troubleshooter:

Open the Get Help app.
Search for an Excel startup, hang, or crash problem.
Run the Excel check troubleshooter and follow its prompts.

It must run on the same Windows PC where Excel is installed.^3^

If only one workbook fails while Excel itself opens, the problem is different from an application startup failure. Note whether:

Excel opens without selecting that workbook.
A blank screen appears.
An error message or code appears.
Nothing happens at all.

For a blank screen when opening a workbook, Microsoft also recommends Online Repair; if that fails, use the Contact us option on its support page.^4^

References