Microsoft today announced the roll-out of Windows 10 Build 10051 to Lumia Windows Phone owners. The roll-out started with server error and it went on for almost 90 minutes. There are some issues in updating the database for provisioning record data. Microsoft has now updated their official blog post saying that launch is delayed by 2 hours. However, people who are already in Fast ring must be able to download this new update.
We discovered this morning that there was an error in the database for provisioning record data, which is required for new phones to join the Fast Ring through the Windows Insider app. The team has been working to correct it but the load on the provisioning data servers has made all operations extremely slow. To fix the issue, we are taking the service offline and updating the provisioning record data for all 5100 phone POPs. It will take approximately 2 hours for us to make the update, and validate that everything is working. This is a different service from Windows Update, so Insiders who are currently on 9941 should be able to update their phones if they are already in the Fast ring. If they are in the Slow ring they will encounter the same issue with provisioning data. We apologize for the delay on this and are working to ensure it never happens again.