Fix Enable-OrganizationCustomization Errors During Exchange Upgrade
Question details
The administrator needs to bypass or resolve an error preventing the execution of the Enable-OrganizationCustomization command during an Exchange Online upgrade.
- Product
- Exchange Online
- Device & OS
- not provided
- Scenario
- Attempting to add roles such as ApplicationImpersonation for migration tools using PowerShell.
- Observed behavior
- The system rejects the command, displaying an error message stating that customization is not allowed while the organization is currently being upgraded.
Ensure you have global administrator or Exchange administrator privileges in your Microsoft 365 tenant and access to the Exchange Online PowerShell module.
Wait for the Organization Upgrade and Retry the Command
Exchange Online locks customizations during automated tenant upgrades. Waiting for this background process to finish is the primary resolution.
Microsoft 365 routinely performs automated background upgrades on Exchange Online tenants. During this time, the organization is temporarily locked from structural changes to prevent data corruption.
Give the Exchange Online tenant up to 24 to 48 hours to complete its automated background upgrade.
Open PowerShell as an administrator and reconnect to your tenant using the Connect-ExchangeOnline cmdlet.
Execute the Enable-OrganizationCustomization cmdlet. Note that this command only needs to be run successfully once per tenant.
Once the customization is enabled, proceed to assign the necessary roles, such as ApplicationImpersonation, to your migration tools.
Open a Support Request in the Microsoft 365 Admin Center
If the upgrade process is stuck and the error persists after waiting, Microsoft Support must manually intervene to clear the upgrade flag.
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Frequently Asked Questions
Why do I need to run Enable-OrganizationCustomization in Exchange Online?
By default, Exchange Online tenants are created in a dehydrated state to save system resources. Running this command hydrates the tenant, allowing administrators to make custom role assignments and organization-wide configuration changes necessary for advanced migrations.
How long does an Exchange Online organization upgrade typically take?
Automated background tenant upgrades usually complete within a few hours to a full day. If you are locked out of customizations for more than 48 hours, the process might be stuck, and you should contact Microsoft support.
Can I check the status of my organization's upgrade in PowerShell?
You can use the Get-OrganizationConfig cmdlet to review general organization settings, but specific backend upgrade statuses might not be entirely visible to administrators. If the customization command continually fails with the upgrade error, opening a support ticket is the most effective diagnostic step.
