The native methods of central email signature management can help you unify email signatures in your organization. Limitations of the native email signatures solution
How to create company-wide email signatures and disclaimers in Office 365.How to set up email disclaimers on Exchange Server.See the links below to learn how to do this natively. If you want to ensure that every mail is well-branded and includes all the details you require, you should manage email signatures centrally, from one place. While the method above is a quick and easy way to set email signatures in OWA, it has some drawbacks (see this article for more information on this topic). If you want to change your email signature, just follow the above steps again.
That’s it! Now you do not have to waste time on creating a signature from scratch every time you write a new email. If you selected to have your signature added automatically, it should be applied at the bottom of your email when you create a new message. Back in your inbox in Outlook on the web, you can check if the settings were applied correctly.When your signature has been created, hit the Save button so that all changes take effect.
You can also create your signature with the free email signature generator and then paste it to Outlook on the web’s editor. Compose your email signature using available formatting tools. There is also a corresponding option for replies and forwards available.