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tgraham-legalops's avatar
tgraham-legalops
Brass Contributor
Nov 04, 2025
Solved

Cannot update Case number in Microsoft Purview eDiscovery

I can no longer update the Case number under case settings in the new eDiscovery UI. I used to be able to update it via the externalId Graph endpoint but that appears to be deprecated. The error simp...
  • nikkichapple's avatar
    Nov 08, 2025

    I have E-Discovery Premium, and I encounter the same error when attempting to update either the case number or case description. 

    However, I can change the case name, and it saves Ok.

    I have found a workaround. I can change the case number if I also change the case name at the same time.

     Then I can immediately change the case name back to the original name. 

     

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