Most Microsoft 365 email problems are caused by one of four things: DNS, Outlook profile settings, mailbox permissions, or authentication issues. The fastest fix is to isolate the layer that is failing before making changes.
Common Microsoft 365 email issues
- Email not reaching the inbox.
- Outlook keeps asking for sign-in.
- Shared mailbox access is inconsistent.
- Mail is delayed, missing or landing in spam.
- Mobile devices are not syncing correctly.
Quick checks before escalating
- Confirm the mailbox license is active.
- Check MX, SPF, DKIM and DMARC records.
- Verify Outlook profile, cached credentials and MFA prompts.
- Review transport rules and mailbox permissions.
- Test from webmail and mobile to narrow the issue.
How Cloudfy resolves recurring issues
- DNS and authentication review.
- Mailbox and shared mailbox permission checks.
- Outlook and device troubleshooting.
- Post-fix verification so the issue does not return.
Related Microsoft 365 guides
- Microsoft 365 for Business
- SPF, DKIM and DMARC in Microsoft 365
- Microsoft 365 pricing and plans in India
Frequently asked questions
Why are Microsoft 365 emails landing in spam?
Usually because of authentication, sender reputation or a DNS misconfiguration that needs correction.
Can Outlook issues be fixed without reinstalling everything?
Often yes. Many issues are tied to cached credentials or a profile problem rather than a full reinstall.
Can Cloudfy troubleshoot the issue remotely?
Yes. Cloudfy can inspect the mailbox, DNS and Outlook settings to isolate the root cause.
Need a Microsoft 365 support review?
Use the Microsoft 365 business page to start the support conversation and then let Cloudfy fix the delivery path.
Go to Microsoft 365 for Business