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Power Automate errors / Config

MailboxNotEnabledForRESTAPI. The mailbox is either inactive, soft-deleted, or hosted on-premise.

platform: Power Automate / category: Config / code: MailboxNotEnabledForRESTAPI

Cause

The Office 365 Outlook connector cannot reach the mailbox because it is on-premises Exchange, lacks an Exchange Online license, or was soft-deleted.

Fix

Confirm the user has an active Microsoft 365 license including Exchange Online. If on-premises, configure Exchange hybrid and enable the REST endpoint, or migrate to Exchange Online. Re-authorize the Outlook connector after assigning the license to refresh the token.

Source thread →

Part of the Automation Error Index — Power Automate errors: browse all.

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