Enter your Exchange 2016 product key. Applies to: Exchange Server 2016. Summary: Learn ways to enter your Exchange 2016 product key. If you're looking for product key information about Office, we've also provided links to get you to the correct articles for that. A product key tells Exchange Server 2016 that you've purchased a Standard or Enterprise Edition license. If the product key you purchased is for an Enterprise Edition license, it lets you mount more than five databases per server in addition to everything that's available with a Standard Edition license. If you want to read more about Exchange licensing, see Exchange 2016 editions and versions. If you don't enter a product key, your server is automatically licensed as a trial edition. The trial edition functions just like an Exchange Standard Edition server and is helpful if you want to try out Exchange before you buy it, or to run tests in a lab. The only difference is that you can only use an Exchange server licensed as a trial edition for up to 180 days. If you want to keep using the server beyond 180 days, you'll need to enter a product key or the Exchange Admin Center (EAC) will start to show reminders that you need to enter a product key to license the server. We've noticed some visitors to this page are looking for information on how to install or activate Office. If that's you, check out these pages. If you want to enter a product key on an Exchange 2010 or Exchange 2013, check out these pages. If you want to enter a product key on an Exchange 2016 server, you're in the right place! Read on. Open the EAC by browsing to Client Access server name /ecp. Enter your user name and password in Domain\user name and Password . and then click Sign in. Go to Servers Servers . Select the server you want to license, and then click Edit. (Optional) If you want to upgrade the server from a Standard Edition license to an Enterprise Edition license, on the General page, select Change product key . You'll only see this option if the server is already licensed. On the General page, enter your product key in the Enter a valid product key text boxes. If you licensed an Exchange server running the Mailbox server role, do the following to restart the Microsoft Exchange Information Store service. Open Control Panel . go to Administrative Tools . and then open Services. Right-click on Microsoft Exchange Information Store and click Restart.
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