Ricky_Deng , Application updates are delivered using Windows store and it is not currently possible to create rings and do gradual rollout within your organization. We are working on enabling controlled rollout of the application through Teams Admin Center in conjunction with Intune so that large organizations can have better control over rollouts. While you can disable store updates today and use Microsoft Endpoint Configuration Manager (formerly known as Systems Center Configuration Manager) to either reimage or install application found within msi that is published with every release, you need to have detailed knowledge of how these systems work and it may add considerable overhead for you. My recommendation is to please join MTR TAP program so you have a few devices enrolled to get early builds. To enroll, submit nomination at https://aka.ms/JoinTap100
Wilfried van Oosterhout , Skype user is necessary to allow systems to always load application to provides access to telephony services, such as emergency calling. Regulatory requirements around enabling easy access to dial pad requires us to load the application when device is powered. There are various other aspects of lock down that happen under Skype user.
ToddMethven , Yes, logs are purged after some time, I am getting more details on exact duration. The logs are only accessible to Administrators of the device which we recommend you only add IT admins with strong auth, such as MFA.
DBR14 , I am sorry that some of your devices got impacted by black screen issue. We are taking this very seriously and are working with Windows application deployment framework and Windows Store teams to get a fix out as soon as possible. This is our top priority.
If following troubleshooting guide doesn't fix the issue, please send us logs and we will help get these devices online. Support should not dismiss this issue saying it is known issue. Please PM me support person name and case number, and also send me links to logs that I can get to engineering team asap.
GerryVS , We have no reports of join failure, so I am not sure what's going on. Please open a support ticker with logs so team can take a look and able to assist.