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Important
SharePoint Add-ins reached end of life in SharePoint Online on April 2, 2026. Both SharePoint-hosted and provider-hosted Add-ins are retired and no longer work in SharePoint Online, including government clouds. Add-in development, deployment, and usage guidance is retained for historical reference and for applicable SharePoint Server scenarios, not for new SharePoint Online solutions.
SharePoint Server Add-ins deployed through an on-premises app catalog are not retired by this change. Acquiring SharePoint Add-ins from the public marketplace ended on April 2, 2026 for SharePoint Server.
This retirement does not retire SharePoint REST APIs, CSOM, JSOM, or SharePoint Framework (SPFx). For SharePoint Online, use SPFx for user interface extensions and Microsoft Entra ID for authentication to external applications. See the retirement announcement and Add-in migration guidance.
(AppHostWebFeatures)
Note
The string app appears as part of or all of some element, attribute, and file names because SharePoint Add-ins were originally called "apps for SharePoint." To ensure backward compatibility, the schemas have not been changed.
Element information
| Name | Value |
|---|---|
| Element type | CustomActionDefinition |
| Namespace | http://schemas.microsoft.com/sharepoint/ |
| Schema file | apphostwebfeatures.xsd |
Definition
<xs:element name="CustomAction" type="CustomActionDefinition"></xs:element>
Elements and attributes
If the schema defines specific requirements, such as sequence, minOccurs, maxOccurs, and choice, see the definition section.
Parent elements
Element |
Type |
Description |
|---|---|---|
Child elements
Element |
Type |
Description |
|---|---|---|
Attributes
Attribute |
Type |
Required |
Description |
Possible values |
|---|---|---|---|---|
Description |
LocalizableString |
optional |
Values of the LocalizableString type. |
|
GroupId |
xs:string |
optional |
Values of the xs:string type. |
|
HostWebDialog |
TRUEFALSE |
optional |
Values of the TRUEFALSE type. |
|
HostWebDialogHeight |
xs:int |
optional |
Values of the xs:int type. |
|
HostWebDialogWidth |
xs:int |
optional |
Values of the xs:int type. |
|
Id |
UniqueIdentifier |
optional |
Values of the UniqueIdentifier type. |
|
ImageUrl |
LocalizableString |
optional |
Values of the LocalizableString type. |
|
Location |
optional |
Values of the CustomActionLocations type. |
||
RegistrationId |
xs:string |
optional |
Values of the xs:string type. |
|
RegistrationType |
optional |
Values of the CustomActionRegistrationType type. |
||
RequireSiteAdministrator |
TRUEFALSE |
optional |
Values of the TRUEFALSE type. |
|
Rights |
xs:string |
optional |
Values of the xs:string type. |
|
Sequence |
Sequence |
optional |
Values of the Sequence type. |
|
ShowInReadOnlyContentTypes |
TRUEFALSE |
optional |
Values of the TRUEFALSE type. |
|
ShowInSealedContentTypes |
TRUEFALSE |
optional |
Values of the TRUEFALSE type. |
|
Title |
LocalizableString |
optional |
Values of the LocalizableString type. |
|
UIVersion |
optional |
Values of the UIVersion type. |