extensionAlternateVersionsArray.prefer.comAddin object

Specifies a COM or VSTO add-in that must be used in place of the Microsoft 365 Web Add-in for Windows.

Syntax

{
  "progId": "{string}"
}

{
  "type": "object",
  "properties": {
    "progId": {
      "type": "string",
      "description": "Program ID of the alternate com extension. Maximum length is 64 characters.",
      "maxLength": 64
    }
  },
  "additionalProperties": false,
  "required": [
    "progId"
  ]
}

Properties

Remarks

The term "progId" is usually associated with only COM add-ins, but in the manifest its value can be the name of a VSTO add-in.

Examples

{
  "alternates": [
    {
      "prefer": {
        "comAddin": {
          "progId": "ContosoExtension"
        }
      }
    }
  ]
}

See also

• Make your Office Add-in compatible with an existing COM or VSTO add-in