extensionAlternateVersionsArray.prefer.comAddin object

2025-06-03

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

Properties that reference this object type:

root.extensions.alternates.prefer.comAddin

Syntax

Syntax
Schema

{
  "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

progId

Identifies the COM add-in which is to be used in place of the web add-in when both are installed on a Windows computer.

Type
string

Required
✅

Constraints
Maximum string length: 64.

Supported values

Examples

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