The warmup planner depends on business hours to avoid awkward send timing. If business hours are left wide open, the runtime can look healthy while still acting in a way that surprises the team using the mailbox.
Use narrower windows during the first warmup days.
Mirror the actual team schedule instead of a generic 24/7 template.
Review the setting again after adding new mailboxes or new regions.
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When to escalate
Escalate only after you have confirmed the schedule, account status, and queued work state from the workspace UI. That gives support the context needed to tell a configuration problem from a runtime bug.
Capture the workspace name and the mailbox involved.
Mention whether the issue is isolated or repeats across multiple accounts.
Use the paid support queue if the workspace already has active paid support.