When you use your account to issue any Outlook REST API request or when you use any Outlook functionality in Microsoft Flow, you may receive the error message: REST API is not yet supported for this mailbox
To fix this issue, use one of the following options, as appropriate for your situation.
- Migrate your mailbox account
- Wait for your mailbox to update, or request a developer preview account
- Upgrade your Office 365 plan
Please refer this link for more details: "REST API is not yet supported for this mailbox" error for request to a mailbox
As a workaround
Use your account create the flow-> open the flow and edit the tab owners, then add the shared inbox as owner
Login Power Automate via the shared inbox-> click My flows and select Team flows->open the flow and edit it->click the button "..." and add new connection->enter the shared inbox email and password, then change the Original Mailbox Address to shared inbox.
Then it will create work item In the Azure DevOps when the shared inbox receives an email
Update1
The distribution list has email address
Steps:
Expand the flow When a new email arrives and enter the distribution list email to the field To or CC, then it will create a work item when the distribution list receives an email.
when an email request with a particular subject
We can configure the field Subject Filter to do this.