What does switching Office 365 plans do to my service and billing?

Here are details of what happens when you switch Office 365 for business plans using the Switch plans wizard. If you have Office 365 operated by 21Vianet in China, learn about the Switch plans wizard here.

Access to services

Admins will not be able to use the Office 365 portal while the plan is being switched. This can take up to an hour.

Users will experience no interruption of service. They will continue to have the existing service until the switch is fully completed.

Users and licenses

Users on the old subscription will be moved automatically to the new subscription.

If your old subscription includes multiple services, and if you have changed which of these services your users are assigned, you may want to make note of this before you switch plans so that you can recreate these changes afterwards. All users will be given access to all services in the new subscription. For example, if you previously purchased Office 365 Enterprise E3 for all 100 of your users, but unassigned the SharePoint Online service from 50 of them, this change would not be retained after you switch plans.

If you have more than one subscription before you switch plans, and have users assigned licenses to more than one subscription, the Switch plans wizard will retain this assignment pattern as much as possible.

All user data will be retained during the switch, including Exchange mailboxes and SharePoint Online documents, lists, and other information.


The day your plan switch is complete, the billing on your old subscription will be turned off and the billing on your new subscription will be turned on. You'll get a prorated credit for any unused service on the old subscription. You’ll receive a new invoice that includes the credit for your old subscription within 30 days of switching to the new subscription.

Note: The length of time it takes to actually credit your payment account depends on the payment method that was used for the subscription.

Switching from a prepaid subscription before it expires? If the total cost of your new subscription is greater than or equal to the remaining value of your prepaid subscription, you won’t lose any prepaid time. On the checkout page, you’ll see a credit for your unused time. However, if the total cost of your new subscription is less than the remaining value of your current prepaid subscription, you’ll forfeit some of your unused time. You’ll be notified before you checkout, and you can wait to switch until closer to your prepaid subscription’s expiration date.

Custom domains

If you have a SharePoint Online Public Website, and want to use another one of your custom domains for it's address, change the address before you switch from a Office 365 Small Business, Office 365 Business Premium, or Office 365 Business Essentials plan to an Office 365 Enterprise plan. If you want to change it to another domain later, you might need to take some extra steps.

Still need help? Contact support.

As an admin for Office 365 for business, you get free access to our knowledgeable support agents for pre-sales, account, and billing support, as well as for help resolving technical issues. You can also contact support on behalf of Office 365 users in your organization.

Get help from the Office 365 community forums Admins: Sign in and create a service request Admins: Call Support

Note: If you’re using Office 365 operated by 21Vianet in China, please contact the 21Vianet support team.

See Also

Billing in Office 365 for business – Admin Help

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