Why Microsoft 365 Keeps Blocking Sign-In and How to Fix It

If your workflow is blocked, confirm the account and app context, then follow the ordered fixes below.

Problem Description: Am Unable Login Microsoft

I am trying to sign into my microsoft 365 on mac, however after the login page where I put my email address in and then press next it just goes to a blank screen and doesnt progress. What do I do? Before the login, if I click on "About word" its says Microsoft Word for Mac, it has my license and has my email address there.

Quick Answer for Resolving Sign-in

To resolve a blank screen after logging into Microsoft 365 on Mac, remove old Office licenses and folders, clear Microsoft entries in Keychain, then try signing in on a different network.

Likely Causes Behind Sign-in & Login Problems

• The Microsoft account or license context may not match the purchase or device.

• Cached credentials, outdated builds, or damaged local components can trigger sign-in & login problems.

• A file-specific corruption or add-in conflict can mimic a broader application failure.

Recommended Solution: Repairing Microsoft 365 Startup Issues

When to use this: Apply these steps when the symptoms match and you can access the relevant Microsoft account or administrator.

1. Ensure macOS and Office are fully updated.

2. Consider whether you recently switched networks, updated macOS, or changed Microsoft account settings, as these can affect sign-in.

Alternative Solutions for When Microsoft 365 Still Fails

1. Retry the Microsoft-side steps after restarting the app and device.

2. Test the same action in a private browser session or a new blank file to isolate account vs file issues.

3. Capture exact error text and screenshots before contacting Microsoft Support or your administrator.

Working with WPS Office: WPS Office for Local Document Work

WPS Office cannot replace Microsoft account, activation, or cloud fixes for this scenario. It remains one of the best free Microsoft Office-compatible alternatives for opening and editing local files.

1. Download and install WPS Office from the official website.

2. Open local Word, Excel, PowerPoint, or PDF files in the matching WPS app.

3. Save a working copy locally while Microsoft-side issues are resolved.

4. Return to Microsoft Office after the primary fix succeeds.

If you need a practical local workspace in the meantime, try WPS Office.

Prevention Tips for Safer Login Habits

• Keep one primary Microsoft account for subscriptions and Office sign-in.

• Install updates for Office and Windows before retrying failed workflows.

• Back up important files before repair, reset, or reinstall actions.

• Register more than one MFA method and keep recovery contacts current.

FAQs About Common Sign-in Answers

Can WPS Office fix this sign-in & login problems issue directly? Only when the WPS steps match the formatting or file task. Account, activation, and cloud issues stay on the Microsoft side.

Should I reinstall Microsoft 365 before trying these steps? Not first. Confirm account, license, and the exact error before reinstalling.

What should I send to Microsoft Support? The affected account email, device type, Office version, exact error text, and screenshots with personal data hidden.