Find invitation templates for Microsoft Word by opening Word, clicking on File, selecting New, going to Microsoft Office Online and then selecting Invitations. Download the template of your choice and customize it offline in Microsoft Word.
Some versions of Microsoft Office list Invitation templates under the Cards category. If there are many templates, narrow down your search by searching for a specific keyword that describes your invitation.
Invitation templates for Microsoft Word are also available online at Templates.Office.com. Once you download templates from this official page or through Microsoft Office, you do not need to download them again, and you can reuse the templates.