logging issues

Do not reset the Microsoft 365 tenant, accounts, licenses, or business data; because a Global Administrator can still sign in and Outlook and SharePoint are unresponsive, first check for an active service incident and then troubleshoot only the affected client or service.

1. Check Microsoft 365 service health

1. Sign in to the Microsoft 365 admin center with the working Global Administrator.
2. Select Health → Service health.
3. Review:
   • Exchange Online for Outlook problems.
   • SharePoint Online for SharePoint and OneDrive problems.
   • Issues for your organization to act on.
   • Active issues Microsoft is working on.
4. Open each relevant incident or advisory and review User impact, Status, and the latest update.

If an active incident matches the symptoms, no account reset is required. Follow the incident updates until Microsoft marks the service restored. The Issue history tab shows incidents resolved during the previous 7 or 30 days.^1^

If the problem is absent from the dashboard, select Report an issue on the Service health page.

2. Determine whether this is organization-wide

Test from two affected users and, if possible, two different computers or networks:

• Open Outlook on the web.
• Open the SharePoint site in a private browser window.
• Record whether all users, only one user, or only one Windows computer is affected.
• Capture the exact error, timestamp, affected site address, and whether the page hangs, times out, or displays Access Denied, 503, or Server is busy.

If Outlook on the web and SharePoint in a browser are both unresponsive for multiple users, proceed to support rather than rebuilding Outlook profiles. If only Outlook for Windows fails, use the client recovery below.

3. If only classic Outlook for Windows is unresponsive

These procedures apply to classic Outlook, not new Outlook for Windows.

1. Close Outlook.
2. Press Windows key + R.
3. Enter:

Outlook /safe

4. If Outlook works in Safe Mode, go to File → Options → Add-ins.
5. Select COM Add-ins → Go, disable the active add-ins, and restart Outlook normally.
6. Re-enable add-ins individually until the problem returns.

If Safe Mode does not resolve it:

1. Open Control Panel → Programs → Uninstall a program.
2. Right-click the Microsoft 365 installation.
3. Select Change → Online Repair.

As the next fallback, create a new Outlook profile through Control Panel → User Accounts → Mail → Show Profiles → Add. Do not remove the existing profile unless its associated data files are backed up or stored on the server.^2^

4. If SharePoint alone remains inaccessible

The next action depends on the message:

• Access Denied / You need permission: In the site, open Settings → Site permissions → Check Permissions, enter the affected user, and select Check Now. Grant the required site or file permission if it is missing.^3^
• 503 / Server is busy: This can indicate SharePoint throttling. Check Service health.
• You are now in line to access this site: Do not repeatedly refresh; the waiting page retries automatically, and manual refreshing can delay access.
• Slow or unresponsive for multiple users: Treat it as a possible temporary service issue and use the Service health dashboard.^4^

5. Check Azure separately

Microsoft 365 Service health does not replace Azure Service Health. In the Azure portal, open Service Health and review service issues affecting the subscriptions, services, and regions your business uses. The public Azure status page is intended mainly for broad incidents; authenticated Service Health provides targeted notices for affected customers.^5^

6. Open support requests if no incident explains the outage

From the Microsoft 365 admin center:

1. Select Help & support at the lower right.
2. Describe the affected services, users, start time, exact symptoms, and completed tests.
3. If the suggested results do not help, select Contact Support.
4. Choose phone or email and submit the request.

Open separate requests for Microsoft 365 and Azure issues. If every Microsoft 365 subscription was purchased through a partner, contact that partner instead of Microsoft directly.^6^

Tenant-access recovery or Data Protection escalation is unnecessary while a Global Administrator can sign in; that process is for tenants where no administrator can access the admin tools.

References

1. How to check Microsoft 365 service health
2. Outlook crashes or stops responding when used with Office 365 | Microsoft Support
3. Access Denied or You need permission errors in SharePoint Online and OneDrive
4. Unable to access SharePoint Online
5. Azure status overview
6. Get support for Microsoft 365 for business