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Servicing and support
Application compatibility

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If you run into compatibility issues or want to ensure that your organization's
applications are compatible from day one, App Assure and Test Base for Microsoft 365
can help.
App Assure
: With enrollment in the 
App Assure
 service, any app compatibility issues
that you find with Windows 11 can be resolved. Microsoft will help you remedy
application issues at no cost. Since 2018, App Assure has evaluated almost 800,000
apps, and subscriptions are free for eligible customers with 150+ seats.
Test Base for Microsoft 365
: For software publishers, systems integrators, and IT
administrators, 
Test Base for Microsoft 365
is a service that allows you to validate your
apps across various Windows features and quality updates and environments in a
Microsoft-managed Azure environment. Enterprise organizations can also nominate
their software publishers for participation by completing a short form.
You might already be using App Assure and Test Base in your Windows 10 environment.
Both of these tools will continue to function with Windows 11.
Prepare for Windows 11
Plan to deploy updates for Windows 10 and Microsoft 365 Apps
App Assure and Test Base for Microsoft 365
Next steps
Also see

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Prepare for Windows 11
Article • 02/27/2023 • Applies to:
✅
 
Windows 11
, 
✅
 
Windows 10
Windows 10 and Windows 11 are designed to coexist, so that you can use the same
familiar tools and process to manage both operating systems. Using a single
management infrastructure that supports common applications across both Windows
10 and Windows 11 helps to simplify the migration process. You can analyze endpoints,
determine application compatibility, and manage Windows 11 deployments in the same
way that you do with Windows 10.
After you evaluate your hardware to see if it meets 
requirements
 for Windows 11, it's a
good time to review your deployment infrastructure, tools, and overall endpoint and
update management processes and look for opportunities to simplify and optimize. This
article provides some helpful guidance to accomplish these tasks.
The tools that you use for core workloads during Windows 10 deployments can still be
used for Windows 11. A few nuanced differences are described below.
If you use 
Windows Server Update Service (WSUS)
, you'll need to sync the new
Windows 11
product category. After you sync the product category, you'll see
Windows 11 offered as an option. If you would like to validate Windows 11 prior to
release, you can sync the