IT Help Guide
Microsoft 365 Email Not Working.
Microsoft 365 mail problems can originate with Outlook, DNS, authentication, mailbox configuration or the Microsoft service itself.
What to check
Test Outlook on the web, confirm the account can sign in, review Microsoft 365 service health and use message trace when a specific sent or received message is missing.
When to get IT support
If the issue affects multiple users, keeps returning, risks business data or you are unsure about the security impact, stop repeated trial-and-error and investigate the underlying cause.
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