Microsoft Support
Microsoft Support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows 11, Surface, and more.
How to modify the TCP/IP maximum retransmission time-out
Windows provides a mechanism to control the initial retransmit time, and the retransmit time is then dynamically self-tuned. To change the initial retransmit time, modify the following registry values.
Secure Boot Certificate updates: Guidance for IT professionals and ...
This article has guidance for: Organizations (enterprise, small business, and education) with IT-managed Windows devices and updates. Note: If you are an individual who owns a personal Windows device, please go to the article Windows devices for home users, businesses, and schools with Microsoft-managed updates.
Xbox network server connectivity on Windows is blocked
Find out how to fix network connectivity problems when using Xbox multiplayer and chat features on Windows 10/11.
How to back up and restore the registry in Windows
Back up the registry manually Start regedit.exe Enter Registry Editor File Export Export Registry File File name Save Restore a manual back up Select Start , type regedit.exe, and then press Enter. If you are prompted for an administrator password or for confirmation, type the password or provide confirmation. In Registry Editor, click File > Import. In the Import Registry File dialog box ...
Enabling the Geolocation service fails with error
As the Geolocation Service can no longer be started, Geolocation will remain disabled on the device and prevent location based functionality from working. To work around this issue, manually delete the following regkey using regedit: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lfsvc\TriggerInfo\3.
Create or change a cell reference - Microsoft Support
Create a cell reference. Cell references can refer to cells on the same worksheet, a different worksheet, or a different workbook.
Applicable à :
Excel pour Microsoft 365, Excel pour le web, Excel 2024, Excel 2021, Microsoft Office
Outlook shows conflict errors when updating or cancelling meetings ...
Please note that the service fix will prevent new occurrences of calendar conflicts. It does not retroactively fix meetings that are already in the conflict state or that have duplicated items. Users that have conflict items only need to use Workaround 2 to clear the conflict items.
Applicable à :
Outlook pour Microsoft 365
How to use SMTP matching to match on-premises user accounts to Office ...
These tools include the Office 365 portal, Microsoft Azure Active Directory Module for Windows PowerShell, and so on. You can transfer the source of authority so that the account can be managed through an on-premises Active Directory Domain Services (AD DS) user account by using directory synchronization.
Windows 10 devices can't connect to an 802.1X environment
Describes an issue that prevents Windows 10 devices from connecting to a WPA-2 Enterprise network that's using certificates for server-side or mutual authentication. Occurs after you apply the Windows 10 November update. A resolution is provided.