Articles
The reply she never got because you couldn't sign in
· 2 min read · Remus Baltatu
Microsoft is reported to stop text and voice sign-in codes for work accounts in February 2027. Owners who rely on them can get locked out of email.
A customer emails your office on Monday morning. She needs to move Thursday's appointment. By Wednesday she has heard nothing, so she cancels and books somewhere else.
Her email arrived. Nobody could read it. The owner had a new laptop, tried to sign in, and waited for the usual text with a code. The text never came.
What is changing
Microsoft is reported to stop sending sign-in codes by text message or phone call for Microsoft 365 work accounts in February 2027. Several universities and IT providers have announced it, but we have not seen it confirmed on Microsoft's own website yet, so ask your IT person for the exact date. After the change, the extra sign-in step is expected to use an authenticator app on your phone or a passkey instead. An account that only has a phone number set up may not get in until an admin helps.
Why owners miss it
You stay signed in on the computer you use every day, so nothing looks different. The lockout shows up later: a new phone, a new laptop, a password reset, a sign-in on a trip. In many small businesses, the person who set up the account years ago is gone, and nobody knows who the admin is. Meanwhile, customer email keeps arriving in a mailbox no one can open.
A short check
- Find out who the admin of your Microsoft 365 account is. Write down the name and how to reach them.
- Sign in at mysignins.microsoft.com and open "Security info." Look at which sign-in methods are listed.
- If the only method is a phone number for texts or calls, add the Microsoft Authenticator app or a passkey now, while you can still sign in.
- Make sure at least two people, or two devices, can get into the mailbox where customer email arrives.
- Ask everyone on your team who answers customers to do the same check.
A customer who writes to you is waiting for an answer. A sign-in that keeps working keeps that answer on its way.
Sources: announcements by the University of Oulu and several IT providers (2026). Reported, not yet confirmed on Microsoft's website.
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