> OnlyOffice, stylized as ONLYOFFICE, is a free software office suite developed by Ascensio System SIA, a company headquartered in Riga, Latvia. It features online document editors, platform for document management, corporate communication, mail and project management tools
Scroll down to _ONLYOFFICE SP Metadata_, and copy the _SP Entity ID (link to metadata XML)_ URL. Open this URL in a new tab, and download the XML file.
Create an application in authentik, and create a SAML Provider by using _SAML Provider from Metadata_. Give the provider a name, and upload the XML file you've downloaded in the previous step.
Navigate back to your OnlyOffice Control panel, and paste the URL into _Load metadata from XML to fill the required fields automatically_, and click the upload button next to the input field.