Hi karen,
Thank you for your message in this forum.
According to your description, it seems that you cannot sign in your Office clients in Windows and encountered an error message.
May I know if the scenario above is consistent with yours? If so, we’d give you some suggestions below and hope that will help you:
- You can try to use a different connection. For example, you can use your phone’s connection by opening a hotspot to check if the same problem will occur. This will
help you troubleshoot if it is caused by firewall or proxies.
- You can go to Control Panel > User Accounts > Credential Manager > Click Windows Credentials > Under Generic Credentials, remove ALL credentials related with MicrosoftOffice16_Data.
If the problem still persists after trying the suggestions above, to better understand your situation, could you provide the information below?
- Could you provide the Product Information and version of your Outlook? You can go to Outlook > File > Account and provide the full screenshot of this page.
- If the scenario above is not consistent with yours, could you provide more details about the situation you encountered?
- Could you provide the screenshot of error message?
- You can also go to Office 365 Portal to check if you can sign in successfully.
Best Regards,
Sukie