An optional component, the CodeTwo Email Signatures for Office 365 Add-in, allows end users to preview server-side signatures while composing emails in Outlook & OWA.the classic CodeTwo Signatures Add-in for Outlook (COM Add-in) that works with Outlook for Windows only.(recommended) the new CodeTwo Signatures Web Add-in for Outlook that works with Outlook for Windows and OWA (and soon with Outlook for Mac),.There are two add-ins that allow users to add signatures to emails directly in Outlook as they type a new message.Only the tenant's global admins and users delegated by the admin can use this app. Email signatures are managed using a web app, accessed from the CodeTwo Admin Panel or directly at.The administrator of a Microsoft 365 (Office 365) tenant configures the software via the CodeTwo Admin Panel, a web-based interface for registering new tenants to the service, accessing signature management as well as managing payments and other tenant-related options.CodeTwo Email Signatures for Office 365 consists of several components that are responsible for handling server-side and/or client-side signatures: