Handling email signatures for all users and devices is a time consuming one while considering large organizations. Sigsync Office 365 email signature service provides a centralized management of Email Signatures for Office 365 and Exchange users. It is a secure, cloud based email signature solution that allows you to create and manage companywide Office 365 email signatures for all the users.

Key features
1. Supports email signature across all the devices (Windows, Mac, Linux, Mobile etc.) and email clients.
2. Allows modifying the signatures by retrieving user details from Azure AD.
3. Adds signatures under latest reply and forward mails.
4. Supports signature in emails in the sent items folder.
5. Allows adding company promotional products, services and events which helps in managing email signature campaign effortlessly.
6. Adds Office 365 profile photos in your email signature
7. Allows creating different signature templates using a simple drag and drop signature generator among the plenty of predefined email signature templates.
8. Supports web analytics, Oneclick survey

To know more
https://www.sigsync.com/