OUTLOOK asks for login repeatedly

Question

OUTLOOK asks for login repeatedly

Michelle 0

every time I open Outlook to get my emails, it asks me for my login credentials. EVERY TIME! this has never happened before. Help Please!

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Hornblower409 16,335 Reputation points

2026-08-18T09:02:19.7233333+00:00

If the AI Answer did not solve your problem, type "Not Solved" in the "Add Comment" box below and then click the [Add Comment] button. I will try to offer some suggestions on what you can do next.
MfloydC 0 Reputation points

2026-09-21T16:15:55.49+00:00

Why doesn't Microsoft fix the Outlook emal issue. It worked before these ridiculously endless updates. Get more competent updaters, that actually think through problems before throwing the consumers to the new Microsoft update Wolves.
Hornblower409 16,335 Reputation points

2026-09-22T23:34:57.0633333+00:00

@MfloydC

I understand that you have the same or similar issue to the one discussed in this thread. But you will probably not get any help by adding to an existing post.

If the Answers presented here did not help, I would suggest that you start a new thread using the "Ask a question" button at the top of this page to create a new Question and include the details for your specific problem and what steps you have already tried to fix it.

This provides much higher visibility to your issue than adding on to an existing post, which is only seen by people who are already following this question.

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2 answers

Hornblower409 16,335 Reputation points

2026-08-18T09:02:19.7233333+00:00

If the AI Answer did not solve your problem, type "Not Solved" in the "Add Comment" box below and then click the [Add Comment] button. I will try to offer some suggestions on what you can do next.
MfloydC 0 Reputation points

2026-09-21T16:15:55.49+00:00

Why doesn't Microsoft fix the Outlook emal issue. It worked before these ridiculously endless updates. Get more competent updaters, that actually think through problems before throwing the consumers to the new Microsoft update Wolves.
Hornblower409 16,335 Reputation points

2026-09-22T23:34:57.0633333+00:00

@MfloydC

I understand that you have the same or similar issue to the one discussed in this thread. But you will probably not get any help by adding to an existing post.

If the Answers presented here did not help, I would suggest that you start a new thread using the "Ask a question" button at the top of this page to create a new Question and include the details for your specific problem and what steps you have already tried to fix it.

This provides much higher visibility to your issue than adding on to an existing post, which is only seen by people who are already following this question.

(You can put the link for this page in your new Question for reference)

Answer 1

Try these fixes in order for classic Outlook on Windows:

Check the saved username and password
- Make sure Caps Lock is off.
- Confirm the username is the full email address.
- If the password was changed with the email provider, update it in Outlook.
Clear cached Outlook credentials
- Open Control Panel > User Accounts > Credential Manager > Windows Credentials.
- Remove Outlook or Office credentials, especially entries that start with MicrosoftOffice15_Data:SSPI or MicrosoftOffice16_Data:SSPI.
- Restart Outlook and sign in again.
If this started after changing from RPC over HTTP to MAPI over HTTP
- After clearing cached credentials, enter the credential in the format domain/user when prompted.
- If Outlook is managed by Group Policy, the Authentication with Exchange Server policy must use Kerberos/NTLM Password Authentication.
If Outlook is connecting to Microsoft 365 and keeps showing “trying to connect...”
- This can happen when Logon network security is set incorrectly.
- For affected older Outlook versions, close Outlook, open Control Panel > Mail, and check the Exchange account Security settings so Logon network security is Anonymous Authentication.
- Newer Outlook 2013 builds and Outlook 2016 are noted as not affected by this specific issue.
If this is Outlook 2016 on Windows connected to Exchange 2013
- Install the latest Office updates: File > Account > Update Options > Update Now.
If adding an IMAP account and Outlook never asks for a password
- On the IMAP details page, make sure Require logon using Secure Password Authentication (SPA) is unchecked.
- If needed, recreate the account from Control Panel > Mail > Email Accounts > New.

Answer 2

Hi Michelle,

If Outlook accepts your password but asks for it again every time you reopen the app, the issue can sometimes be related to the local Outlook profile rather than the saved credentials themselves.

You may want to try creating a new Outlook profile:

Close Outlook.
Open Control Panel > Mail > Show Profiles.
Select Add, create a new profile, and set up your email account.
Choose Always use this profile and select the new profile.
Open Outlook and test whether the sign-in prompt returns.

If the issue continues, it would help to know:

Which version of Outlook you're using (Microsoft 365, Outlook 2021, etc.)
Whether this is a Microsoft account, work/school account, or another email provider
If the problem started after a recent password change, update, or PC change

Hopefully a fresh profile resolves the repeated sign-in prompts. Let me know if you need further assistance, feel free to ask me by clicking "Add Comment" or "Add Answer" if you cannot add comment so your response will be visible. Thanks for your effort.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Hendrix-V 19,655 Reputation points Microsoft External Staff Moderator

2026-08-20T07:03:12.1233333+00:00

Hi Michelle,

If you have any further questions or updates regarding this issue, please feel free to let me know in the Comments section. I'd be happy to assist you.