outlook will not let me in

Question

outlook will not let me in

Stacy LeBlanc 0

I was in outlook earlier today and it won't let me get back in. I am trying to add it back and it keeps dying

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2 answers

Your answer

Answer 1

Welcome to Microsoft Q&A!

Hello,

What you are experiencing is currently linked to an active Microsoft 365 service incident tracked under ID EX1550543.

Microsoft initially reported intermittent connectivity issues affecting Exchange Online mailboxes in the Americas, and has since updated the advisory to confirm that the issue may impact general Microsoft 365 service connectivity across any region.

What this means for your environment:

Affected Services: Primarily Exchange Online / Outlook (desktop client, Outlook on the web, and mobile apps), along with potential authentication or connection timeouts across broader Microsoft 365 services (such as Teams, SharePoint/OneDrive, or the Microsoft 365 Admin Center) that rely on shared front-end connectivity infrastructure.

Action Required: No configuration changes are needed on your tenant or client devices. Microsoft engineering teams are actively working on mitigation.

How to track live status:

Open the Microsoft 365 Admin Center using a Global Admin or Service Support Admin account.

Navigate to Health > Service health.

Search for incident ID EX1550543 for real-time mitigation progress and root cause updates.(You can also follow official updates via @MSFT365Status on X).

Help make this community better for everyone: if this answer resolved your issue, please accept it or leave an upvote.

Answer 2

End the Outlook process in Task Manager, reopen it, and then use the recovery steps below for either new Outlook or classic Outlook.

1. Close the stuck Outlook process

Right-click Start and select Task Manager.
Select Microsoft Outlook or OUTLOOK.EXE.
Select End task.
Close Task Manager and open Outlook again.

This is Microsoft’s first recovery step for new Outlook when it stops working.^1^

2. Identify which Outlook app you have

New Outlook: Usually labeled Outlook (new) or new Outlook for Windows in the Start menu.
Classic Outlook: Usually labeled Outlook (classic) or is installed as part of Microsoft 365/Office.

The repair procedures are different.

If you have new Outlook

Open Start and find new Outlook for Windows.
Expand its menu and select Uninstall.
Restart Windows.
Open Microsoft Store, search for Outlook, and select Get.
Open Outlook and follow the prompts to add the account again.

Reinstalling through Microsoft Store is the documented recovery procedure for new Outlook.^1^

If you have classic Outlook

Test whether an add-in is crashing Outlook:

Press Windows key + R.
Enter:

outlook.exe /safe

Select OK, accept the default profile, and sign in if requested.
If Outlook remains open, go to File → Options → Add-ins.
At the bottom, select COM Add-ins → Go.
Record or photograph which boxes are selected, then clear all the boxes. Do not select Remove.
Restart Outlook normally.
Re-enable the add-ins one at a time, restarting Outlook after each one. Leave the add-in that causes the crash disabled.^1^

If Outlook also crashes in safe mode, repair Office:

Search Windows for Control Panel.
Select Programs → Uninstall a program.
Right-click Microsoft 365 or Microsoft Office.
Select Change → Online Repair and complete the repair.^2^

If repair does not help, create a separate Outlook profile:

Close Outlook.
Open Control Panel → User Accounts → Mail → Show Profiles.
Select Add—do not remove the existing profile or its data files.
Name the new profile, enter the email address, and finish setup.
Hold Shift while starting Outlook and select the new profile.^2^

If the new profile works, the original profile is damaged. If it still crashes, Windows 10 or later users can run the classic Outlook advanced diagnostic troubleshooter through Get Help; it does not support new Outlook.^2^

References