Windows 11 SOLVED Getting error 0x80070cf

J

John Clark

Extraordinary Member
Joined
Sep 8, 2016
Messages
115
Started getting this error trying to get into Outlook. Have gone through resetting IP address.
Any suggestions on getting rid of error.
 
I can help, but I need the exact Outlook error text or a screenshot first.
Right now I only know:
  • it happens when you try to open Outlook
  • you already tried resetting the IP address
Resetting IP usually helps only with network/socket problems. If Outlook is failing at startup, the cause could instead be:
  • a bad Outlook profile
  • cached credentials/token issue
  • corrupted navigation pane
  • add-in crash
  • Microsoft account sign-in problem
  • server/connectivity error

Fastest way forward​

Please post one screenshot of the error window, or type the exact wording, including any code like:
  • 0x800...
  • 0x800CCC...
  • Cannot start Microsoft Outlook
  • The connection to the server failed
  • Need password
  • We couldn't log on
  • Something went wrong

While you grab that, here are 3 safe quick tests​

1) Start Outlook in Safe Mode​

Press Win + R, then type:
outlook.exe /safe
  • If Outlook opens in Safe Mode, the problem is often an add-in or view/navigation corruption.

2) Reset the Navigation Pane​

Press Win + R, then type:
outlook.exe /resetnavpane
This is safe and often fixes startup errors.

3) Try webmail​

Sign in to your mail in a browser.
  • If webmail works but Outlook does not, the issue is likely local to Outlook on the PC
  • If webmail also fails, it may be account/server related

Reply with these 2 things​

  1. The exact error message or screenshot
  2. Whether outlook.exe /safe opens Outlook or not
Then I can give you the right fix instead of guessing.
 
Steps 1 & 2 error 0x80070cf pops up. I can get into webmail with no problem. Error message attached.
 

Attachments

  • Clipboard_04-14-2026_02.webp
    17 KB · Views: 0
Thanks, John — the screenshot shows error 0x800704cf.
That code usually means Windows’ Microsoft sign-in component cannot reach the network/auth service, even though your internet itself is working.
Since:
  • webmail works
  • Outlook fails even with outlook.exe /safe
  • outlook.exe /resetnavpane gives the same result
this is probably not an Outlook mailbox problem. It is more likely a Windows sign-in / cached credentials / proxy / profile issue.

1) First check the easy items​

A. Make sure Proxy is OFF​

  1. Open Settings
  2. Go to Network & Internet
  3. Open Proxy
  4. Make sure Use a proxy server is Off
  5. If Automatically detect settings is On, leave it on

B. Check date/time sync​

  1. Open Settings
  2. Go to Time & language
  3. Open Date & time
  4. Turn Set time automatically On
  5. Click Sync now
A bad clock can break Microsoft sign-in.

C. Temporarily disable VPN / web shield / 3rd-party firewall​

If you use:
  • VPN
  • Avast/AVG/Norton web shield
  • firewall suite
turn it off briefly and test Outlook again.

2) Clear stored Microsoft/Office sign-in credentials​

  1. Open Control Panel
  2. Open Credential Manager
  3. Open Windows Credentials
  4. Remove anything related to:
    • Outlook
    • Office
    • MicrosoftOffice
    • ADAL
    • OneAuth
    • login.live.com
    • login.microsoftonline.com
  5. Reboot
  6. Test Outlook again

3) Create a new Outlook profile​

Because webmail works, a damaged Outlook profile is very possible.
  1. Close Outlook
  2. Open Control Panel
  3. Open Mail (Microsoft Outlook)
  4. Click Show Profiles
  5. Click Add
  6. Create a new profile
  7. Add your email account
  8. Set the new profile as default for testing
  9. Open Outlook
If the new profile works, the old one was corrupted.

4) Reset the Microsoft sign-in cache​

If the profile does not help, reset the Windows Microsoft-auth cache.

Safer part first​

  1. Open Settings
  2. Go to Accounts
  3. Open Email & accounts
  4. Under Accounts used by other apps, remove your Microsoft account if listed
  5. Reboot

Then test Outlook again​

5) If still broken, reset the auth cache folders​

This signs you out of Microsoft apps, but it is often the fix.
  1. Close Outlook and all Office apps
  2. Press Win + R
  3. Open each path below and rename the folder by adding .old
%LOCALAPPDATA%\Microsoft\OneAuth
%LOCALAPPDATA%\Microsoft\IdentityCache
  1. Reboot
  2. Open Outlook and sign in again

6) One browser test​

Before reopening Outlook, confirm these open normally in your browser:
[url unfurl="true"]https://login.live.com[/url]
[url unfurl="true"]https://account.microsoft.com[/url]
If those open fine, your internet is okay and the problem is almost certainly local Outlook/Windows auth cache.

What I would do first​

In this order:
  1. Proxy off + time sync
  2. Credential Manager cleanup
  3. New Outlook profile
  4. Rename OneAuth and IdentityCache
Since you already proved the mailbox itself works in webmail, I think new Outlook profile or auth cache reset is the most likely fix.
If you want, I can give you the shortest exact click-by-click steps for creating the new Outlook profile next.
 
The setting "Time Automatically" was off.
Setting that to ON solved the problem.
How do I label this post SOLVED?
 
Excellent — that fits the error perfectly. A wrong or unsynced system clock can break Microsoft sign-in/auth and trigger 0x800704cf, even when normal web browsing still works.

To mark the thread solved​

On WindowsForum, usually do this:
  1. Open the thread
  2. Find your first post
  3. Look for Thread Tools or the three-dot menu
  4. Choose Mark solved / Solved
If you do not see that option, then the forum may only allow:
  • the thread starter in certain forums, or
  • moderators
In that case, just reply with something like:
Solved — Windows date/time “Set time automatically” was OFF. Turning it ON fixed Outlook error 0x800704cf.
That clearly documents the fix for others too.

Small recommendation​

Now that it’s fixed:
  1. Leave Set time automatically = ON
  2. Click Sync now
  3. Reboot once later just to confirm it sticks
Nice catch, and glad this one ended simply.
 
You must log in or register to reply here.

Similar threads

  • Article Article
Windows 11 KB5079391 Pulled: Install Error 0x80073712 and 2026 Update Fallout
Replies
0
Views
25
ChatGPT
  • Article Article
How to Fix Windows Update Error 0x80070643: Complete Troubleshooting Guide
Replies
0
Views
1K
ChatGPT
  • Article Article
Understanding Windows Update Error 0x80070643: Causes, Fixes, and Microsoft’s Outlook
Replies
0
Views
888
ChatGPT
  • Article Article
Microsoft fixes Windows upgrade error 0x8007007F with OOB updates (Aug 2025)
Replies
0
Views
319
ChatGPT
  • Article Article
How to Fix Windows Error 0x80070006: Troubleshooting Your PIN Issue
Replies
0
Views
563
ChatGPT