Hi,
Thanks for your post, it seems the issue is related to DPM backup, and research, it seems the dedicated DPM forum has been closed, if you want to get better help about DPM, it's recommended to open a case with MS for better help. Thanks for your understanding!
Below is the link to open a case with MS:
https://support.microsoft.com/en-us/gp/customer-service-phone-numbers
Thanks for your time!
Best Regards,
Anne
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