ExSign for Microsoft 365

Outlook Edition

Client-Side Signatures for Microsoft 365.

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Signatures for M365 (Client-Side)

Allow Microsoft 365 users to see their signatures in their Outlook clients while they compose emails. With the ExSign for Microsoft 365 Outlook Edition, signatures are directly inserted into the email body as senders compose their email in Microsoft Outlook.

With our specially designed Outlook add-in, signatures are automatically retrieved and applied to the desired mailboxes, enabling end users to see their signatures in real-time as they compose emails.

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Signatures for Microsoft 365

More Control

Create standard signatures for all users in your Microsoft 365 organization. Display signatures to your users, as they type in their emails in their Outlook clients. Maintain full control over signatures while still allowing your employees a full preview.

How Mail Flows in M365 Outlook Edition

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Outlook Clients

Works seamlessly with Outlook for Windows Web, OWA, Mac, and Outlook for iOS and Android. With support for a wide range of Outlook apps and platforms, it is the perfect solution for sending emails from any device, including mobile phones and tablets.

ExSign Email Signature support for a wide range of Outlook apps and platforms
Authentication Through Azure

Authentication Through Azure

Don't worry if your Microsoft 365 organization lacks physical infrastructure such as servers or hardware. With the ExSign for Microsoft 365 Outlook Edition, administrators can authenticate through Azure and log into the application to administer their accounts.

Hybrid Mode

Can work in a hybrid mode. Hybrid mode is a combination of client-side signatures and server-side signatures. For users configured to use server-side stamping, signatures are stamped after an email is sent while for those configured to use client-side stamping, signatures are inserted in the email body.

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ExSign Hybrid Mode Client-side Signatures and Server-side Signatures

Why ExSign for M365 Outlook Edition?


Unlike its server-side counterpart, ExSign for M365 Outlook Edition does not require M365 connectors or mail flow rules to route and process email stamping. It only uses an Outlook web add-in to fetch signatures from the central ExSign web portal and update them in Outlook.

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