How to Add an Accidentally Deleted Device Back in Microsoft 365

To add an accidentally deleted device back in Microsoft 365, use the correct account, product, permissions, and destination. This guide explains the supported workflow and the checks that confirm the result.

Confirm the Account, Product, and Expected Result

Confirm the owning account, required permissions, affected files or services, and the exact outcome you need. Keep a backup when the task changes local content or removes access.

Quick Supported Workflow

First, sign in to your account online first using a browser, then go to your device and remove the work account under Settings > Accounts > Access work or school, restart, and add it back using Connect. Next, sign out and sign back in, and verify the final state before changing any backup or secondary account.

How to Add an Accidentally Deleted Device Back in Microsoft 365

1. Sign in to your account online first using a browser, then go to your device and remove the work account under Settings > Accounts > Access work or school, restart, and add it back using Connect
2. Sign out and sign back in
3. Open Command Prompt as administrator
4. Sign out and sign back in to complete the recovery
5. Go to Settings > Accounts > Access work or school
6. Select the work or school account and choose Disconnect

After the final step, reopen the affected app, portal, file, or account page and confirm the exact status or behavior described in the title.

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Practical Checks That Prevent a Repeat

• Record which account, app, and file owns the workflow
• Keep a verified backup before removing access, changing ownership, or replacing a local file
• Apply high-impact changes to one test item or user before expanding the scope
• Save confirmation numbers, dates, and screenshots of the final settings when they affect billing, security, or permissions

Frequently Asked Questions

Why should I sign in to your account online first using a browser?

Sign in to your account online first using a browser, then go to your device and remove the work account under Settings > Accounts > Access work or school, restart, and add it back using Connect. Use the account that owns the file, subscription, tenant, or setting. Personal and work accounts can expose different controls.

What should I check after I sign out and sign back in?

A small test confirms the correct account, permissions, and destination before the action affects a larger set of files or users. Confirm the account type, product version, ownership, and permissions before assuming the control is unavailable.

What result should I expect after I open Command Prompt as administrator?

Keep the original file, confirmation messages, relevant account details, and any existing case or transaction number needed to reverse or verify the action. Keep the relevant backup or confirmation until you have checked the result.

How can I confirm that the steps to add an accidentally deleted device back in Microsoft 365 worked?

Select the work or school account and choose Disconnect. Reopen the affected app or portal and confirm that the expected status persists.