Changes to Get attachment

Changed in 4 of the 10 revisions of this API.●1○21

1. Jul 17, 2026af62694b9f2d○1
2. May 27, 2026354d90657cdd○1
3. May 26, 20265c775c50414c○9
4. May 26, 2026c6fc1d98f528●1○10

What changed

• Jul 17, 2026af62694b9f2d○1See the full diff
  • ○

    added the optional property allOf[subschema #2: attachment]/contentBytes to the response with the 2XX status

    response-optional-property-added

• May 27, 2026354d90657cdd○1See the full diff
  • ○

    api operation id me.messages.GetAttachments removed and replaced with getAttachment

    api-operation-id-removed

• May 26, 20265c775c50414c○9See the full diff
  • ○

    mapped value for discriminator key #microsoft.graph.attachment changed from microsoft.graph.attachment to MicrosoftGraphAttachment for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.fileAttachment changed from microsoft.graph.fileAttachment to MicrosoftGraphAttachment for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.fileAttachment changed from microsoft.graph.fileAttachment to MicrosoftGraphAttachment for allOf[subschema #2: attachment] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.itemAttachment changed from microsoft.graph.attachment to MicrosoftGraphAttachment for allOf[subschema #2: attachment] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.mailFolder changed from microsoft.graph.mailFolder to MicrosoftGraphMailFolder for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.mailSearchFolder changed from microsoft.graph.mailSearchFolder to MicrosoftGraphMailFolder for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.message changed from microsoft.graph.message to MicrosoftGraphMessage for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.outlookItem changed from microsoft.graph.outlookItem to MicrosoftGraphOutlookItem for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.referenceAttachment changed from microsoft.graph.attachment to MicrosoftGraphAttachment for allOf[subschema #2: attachment] response property for the response status 2XX

    response-property-discriminator-mapping-changed

• May 26, 2026c6fc1d98f528●1○10See the full diff
  • ●

    removed the optional property allOf[subschema #2: attachment]/contentBytes from the response with the 2XX status

    response-optional-property-removed

  • ○

    api operation id getAttachment removed and replaced with me.messages.GetAttachments

    api-operation-id-removed

  • ○

    mapped value for discriminator key #microsoft.graph.attachment changed from MicrosoftGraphAttachment to microsoft.graph.attachment for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.fileAttachment changed from MicrosoftGraphAttachment to microsoft.graph.fileAttachment for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.fileAttachment changed from MicrosoftGraphAttachment to microsoft.graph.fileAttachment for allOf[subschema #2: attachment] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.itemAttachment changed from MicrosoftGraphAttachment to microsoft.graph.attachment for allOf[subschema #2: attachment] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.mailFolder changed from MicrosoftGraphMailFolder to microsoft.graph.mailFolder for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.mailSearchFolder changed from MicrosoftGraphMailFolder to microsoft.graph.mailSearchFolder for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.message changed from MicrosoftGraphMessage to microsoft.graph.message for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.outlookItem changed from MicrosoftGraphOutlookItem to microsoft.graph.outlookItem for allOf[subschema #1: entity] response property for the response status 2XX

    response-property-discriminator-mapping-changed

  • ○

    mapped value for discriminator key #microsoft.graph.referenceAttachment changed from MicrosoftGraphAttachment to microsoft.graph.attachment for allOf[subschema #2: attachment] response property for the response status 2XX

    response-property-discriminator-mapping-changed