DCS incident

“The HTTP request was forbidden with client authentication scheme 'Anonymous'” Errors

Minor Resolved View vendor source →

DCS experienced a minor incident on November 25, 2025 affecting CloudCover365 Services, lasting 5d 21h. The incident has been resolved; the full update timeline is below.

Started
Nov 25, 2025, 04:51 PM UTC
Resolved
Dec 01, 2025, 02:42 PM UTC
Duration
5d 21h
Detected by Pingoru
Nov 25, 2025, 04:51 PM UTC

Affected components

CloudCover365 Services

Update timeline

  1. investigating Nov 25, 2025, 04:51 PM UTC

    We’re aware of jobs failing with the error “The HTTP request was forbidden with client authentication scheme 'Anonymous'.” We’re investigating this with the vendor.

  2. resolved Dec 01, 2025, 02:42 PM UTC

    This was identified as a change by Microsoft in what licenses are required to perform CloudCover 365 backup. If you're still seeing this on any mailboxes please confirm that a supported Microsoft 365 plan that includes full Exchange Online and Graph API support is used (e.g., Microsoft 365 Business Standard, E3/E5).