mircosoft 365 cant log in

Select Work or school account for the @premierplastering.biz address; the two entries can represent separate personal and business identities that happen to use the same email address.

Microsoft does not document a specific meaning for code 48v35 in the available official guidance, so treat the duplicate identity and Outlook failure as separate issues.

1. Identify which account is failing

1. Close Outlook.
2. In a private or InPrivate browser window, open the Microsoft 365 sign-in page you normally use.
3. Enter the full @premierplastering.biz email address.
4. If asked “Which account do you want to use?”, select Work or school account, not Personal account.

That prompt means the same address exists as both:

• a Microsoft 365 work or school account, created for the business; and
• a personal Microsoft account, possibly created previously for another Microsoft service.

These accounts cannot be merged, although they can coexist.^1^

Do not post the complete email address, password, or verification codes publicly.

2. If browser sign-in works but classic Outlook still shows 48v35

This points to a local Outlook/Office sign-in-state problem rather than an inaccessible Microsoft 365 account.

1. Close Outlook, Word, Excel, Teams, and other Microsoft 365 apps.
2. Open Windows Settings → Accounts → Email & accounts.
3. Under Accounts used by other apps, remove the unintended personal or duplicate account only. Do not remove the business account Windows actually uses.
4. Restart Windows.
5. Open Get Help from the Start menu.
6. Search for sign in to Microsoft Office and complete the Microsoft 365 sign-in troubleshooter on that PC.^2^
7. Reopen Outlook and authenticate with the Work or school identity.

If Outlook still fails, create a fresh Outlook profile without deleting the existing one:

1. Close Outlook.
2. Open Control Panel → Mail (Microsoft Outlook) → Show Profiles.
3. Select Add, enter a profile name, and add the business email.
4. Select Always use this profile, choose the new profile, and select OK.
5. Start Outlook and test it before removing the old profile.

A new profile preserves the old one while rebuilding Outlook’s account configuration.^3^

3. If browser sign-in also fails

Ask the Microsoft 365 administrator for the business to check:

• the exact Microsoft 365 username;
• whether the account is blocked;
• whether an Exchange/Outlook license is assigned;
• the failed sign-in record.

An administrator with at least Reports Reader access can use Microsoft Entra admin center → Entra ID → Monitoring & health → Sign-in logs, filter by username and Failure, and inspect the failure reason, error code, and correlation ID.^4^

4. Permanently remove the duplicate-account prompt

If the second entry is a personal Microsoft account that also uses the business address:

1. Sign in specifically to the Personal account.
2. Open Manage how you sign in.
3. Add another personal email address or create an Outlook.com alias.
4. Select Make primary for that new alias.

This changes the personal account’s sign-in name without changing the Microsoft 365 business mailbox.^1^ If that personal account is tied to subscriptions or developer services, check those dependencies before changing its primary alias.

References

1. Which account do you want to use? | Microsoft Support
2. Microsoft 365 troubleshooters | Microsoft Support
3. Login issue with Outlook Classic with Office 365 Family)? - Microsoft Q&A
4. How to troubleshoot Microsoft Entra sign-in errors