Forum Discussion
PeterHer007
Jul 11, 2025Copper Contributor
Not able to logon office 365 account or change it
If I want to logon to my Office 365 account I have to enter my emailaddress. Its is an @.onmicrosoft.com account. Entering password is ok, but then I am have to verify my phone number. The last two d...
Kidd_Ip
Jul 12, 2025MVP
Are you the only admin under your O365 tenant? Please try the below:
- Use Microsoft Authenticator App Instead of SMS
If SMS verification is blocked, switching to the Microsoft Authenticator app may bypass the issue. You’ll need to set this up from a device that’s already signed in or through your IT admin. - Ask Your Admin to Unblock MFA in Entra ID
If you’re the admin, or can contact one, go to entra.microsoft.com → Protection → Multifactor authentication → Block/unblock users. From there, the blocked phone number can be reviewed and unblocked with a business justification. - Register a Different Phone Number
If possible, try adding a new phone number to your account via the Microsoft 365 Admin Center. This may require admin access or support from your IT team.
PeterHer007
Jul 14, 2025Copper Contributor
Thank you for your reply.
I tried logon to entra.microsoft.com, but I am facing the same problem that I cannot bypass the SMS check.
No matter which site I try to logon, the SMS screen is always popping up and there is no other way I can reach my account. I am able to change the password, but that is all. I tried contacting the helpdesk (Dutch phone numbers), but without any success. Is there another way I can be in contact with support? I have a business account and the phone numbers online are for private use, so they cannot help me.