Didn't want you to feel like it was just you @jim.smith. I had telemetry send failures today as well. Started at 10:04 PDT with the last system error at 16:04 PDT. Cleared up on it's own. I filtered the system log on "send-failed" and found a similar episode on 3/29 that cleared on it's own as well. Guessing you're right. Some sort of backend system maintenance or issue.
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