M365 Change Tracker

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Deprecationbeta

Removed the contactId property from the member resource.

Why it matters: API deprecation — update before it's removed

4 removed 3 added
Removed contactId, recipientType, routingType, members
Added memberId, members +1 more

Removed the contactId property from the member resource. Added the memberId property to the member resource. Removed the recipientType property from the member resource. Removed the routingType property from the member resource. Added the type property to the member resource. Removed the members property from the distributionList resource. Added the members relationship to the distributionList resource.

How this was classified (derived by the tracker — not Microsoft's label)
  • deprecation · 80% confidence · matched Graph API removal/deprecation
    Removed the contactId property from the member resource
Source last updated 2026-08-12

Affected: Microsoft Graph, Mail

Related changes

Change history

2026-10-16 · First captured by tracker

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