Office 365 readiness checks

Use the Office 365 health, connectivity and readiness checks to make sure your on-premises environment is ready for the Office 365 services.

The readiness checks for Office 365 are part of an automated tool that gathers configuration requirements for the services you want to set up. We recommend you run the checks before you set up Office 365 and here's why:

  • Checks can find settings in your current environment that might cause problems when you start to set up or use your services.

  • If you know where the potential roadblocks are before you start, you can fix or work around them to make your deployment path easier to complete.


Your computer has to meet minimum requirements and you have to download a small app before we can run checks. Requirements are listed in the tool before you download the app and the tool will let you know if something’s missing.

The readiness checks are looking at settings in your current local network environment and anything you’ve already set up in Office 365. The checks use your credentials to make their inspection. Run the checks while connected to your current local network and logged in as an admin.

To download the readiness check tool you must:

  • Have a 64-bit version of Windows 7 or later with .NET 3.5

  • Internet Explorer 9.0 (this is already on your computer if you are running Windows 10).

  • Windows PowerShell V 2.0

Run the readiness checks

Important: The readiness checks run against the environment that your computer is currently connected to and uses your credentials to inspect configuration. You should run these checks while connected to your current local network environment and while logged in as an admin. Outlook and computer checks run only against the local computer and don't inspect all of your workstations, so if some users have a non-standard configuration, you may want to run these checks from more than one computer. No data is stored during this process.

To run the readiness checks:

  1. Go to, and on the Checks page choose Check your configuration with Office 365 health, readiness, and connectivity checks.

  2. Choose Quick or Advanced > next > run checks.

  3. Install any prerequisite software (when prompted). You have to download a small app for the checks to run.

  4. Review the results of the checks:

    • Passed:    the setting that we checked is correct for Office 365. You might want to review passed items to see what we looked at, but these results are informational only.

    • Warning:    the setting that we checked won't break anything, but isn't optimized forOffice 365. You can review the results to see if this is an important setting for you. If you want to learn more about the warning, or learn how to change the setting, you can get help from the panel to the right.

    • Error:    the setting that we checked will negatively affect your setup and should be fixed before you continue. Definitely review these results and make changes as needed. Help on how to fix issues is available from the panel to the right. If you see an error for something you haven't set up yet, such as DNS records, you can ignore the error for now. But, we recommend you run the readiness checks again after you get set up.

Important: If you see an error that states "proxy authentication required", when you are attempting to install and run HRC, then you network is configured with a proxy or firewall that requires a form of authentication other than ‘Windows Integrated.’ For example, Basic authentication which requires the user to enter a username and password. To avoid the error, reconfiguration of the server/appliance/application requiring authentication would be necessary, to allow the ClickOnce application (in this case HRCClient.v3.5) through without the current authentication requirement. For more information, see the "ClickOnce and Proxy Authentication" section in Server and Client Configuration Issues in ClickOnce Deployments.

See Also

Deploy Office 365 Enterprise for your organization

Plan your setup of Office 365

Expand your skills
Explore training
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Join Office Insiders

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