On Thursday, November 12, Microsoft had one of its biggest outages of the year. Outlook, Exchange Online, Teams, SharePoint and other Microsoft 365 services stopped working for millions of people. Recovery stretched into Friday. Microsoft said the cause was a technical problem tied to an earlier network capacity upgrade, not a cyberattack, and that a full post-incident report will follow.

Most coverage focused on people who couldn't send email or join meetings. For a business that runs on inbound leads, the bigger question is simpler: what happened to the people who tried to reach you that day?

Where leads quietly disappear during an outage

  • Website form notifications. If your contact form sends leads only to an Outlook inbox, those leads may have arrived late or not at all.
  • Email follow-up. Auto-replies, quotes and appointment confirmations sent from Microsoft 365 were delayed or queued.
  • Team handoffs. If your team passes leads to each other in Teams, those handoffs stopped.
  • Calendar booking. Booking tools connected to Outlook calendars may not have synced.

None of this shows up as a dramatic failure. It shows up a week later as a slow month and nobody can say why.

A simple backup plan for any business

  1. Send every form lead to two places. Your inbox and your CRM (HubSpot, GoHighLevel or similar), so one outage can't lose the lead.
  2. Get text alerts for new leads. A text alert to the owner or office manager still works when email doesn't.
  3. Track your calls. Call tracking records every call and missed call, so you can call people back after an outage instead of guessing who you lost.
  4. Keep a second email route. Know how you'll email customers if your main provider is down, whether that's a backup account on another provider or sending from your CRM.
  5. Check after any outage. Compare form submissions, calls and CRM entries for the outage window and follow up on anything that slipped.

This isn't about Microsoft vs. Google

Every provider has outages, Google included. The lesson isn't to switch platforms in a panic. It's to avoid having a single point of failure between a new customer and your business. (At Minding Your Media we run on Google Workspace, and we still build every client's lead flow so it doesn't depend on any one inbox.)

Common questions

Did the Microsoft outage affect website forms?

Forms themselves usually kept working, but if the form's notifications went to an Outlook or Exchange inbox, those emails could be delayed. Check your form tool or CRM for submissions from November 12–13.

How do I know if I missed leads?

Compare your form tool, call tracking and CRM records for the outage window against the replies you actually sent. Anyone who reached out and didn't hear back should get a call.

Should I switch from Microsoft 365?

Not because of one outage. Build a backup route for leads first; that protects you no matter which provider you use.

Next step: If you're not sure where your leads go when email goes down, we'll map your lead flow and close the gaps. See marketing automation and CRM setup and AI Front Desk and lead recovery.