Understanding CodeTwo Email Signatures for Office 365

About the program

The program will allow you to create email signature rules that will stamp signatures to emails sent from Office 365 from any device and email client.

Program’s backend, CodeTwo Email Azure Service, resides on Microsoft Azure servers and it’s responsible for processing your emails and stamping signatures. This is also where your rules and settings are kept. The administration panel, which is used to create rules and design signatures, is a web applet (ClickOnce technology) that is launched directly from CodeTwo’s website. So there is nothing to install and you can run the program on any Windows machine anywhere in the world.

Find out more on CodeTwo Email Signatures for Office 365 in software's overview article.


To launch the program, you will have to provide your global admin login details. Rest assured your login and passwords are safe, as we use Azure Oauth2 authentication, which means we do not store your credentials. During the registration process, the program will ask you to create connectors that will reroute emails sent by users of your choosing through CodeTwo Email Azure Service. In other words, you do not have to create connectors for all users, but only for test users in your organization.


Please bear in mind that it might take a bit to cache your Active Directory data to CodeTwo Email Azure Service after you set up the program. Connectors should work approximately after 15 minutes, but for the transport rule, which is also created during the setup, it can take up to 1 hour until it goes live.

If you have other transport rules already configured in your Office 365 tenant, you need to be aware that they may affect the functionality of our software, and vice versa. It might be required to change the order of transport rules, add some exceptions to existing ones, or even stop processing further rules once particular one is applied.

Last but not least, in hybrid environments our software will process only emails going through EOP servers. In environments with centralized mail transport, messages might be delivered to on-premises Exchange servers and they will not go through CodeTwo Email Azure Service, which means they will not get signatures. In such a scenario you may use CodeTwo Exchange Rules Pro installed on On-premises Exchange Server.

Thanks and good luck with testing the product! We can hardly wait to hear what you think about it.

What's next

Go to Supported platforms and requirements article to make sure you can use this software. If so, head now to Installation process description and brief instructions on rules configuration and signature editor usage.

We would be sad to hear you need guidance on removing the software, but in the case this happens you can find it in this How to uninstall article.

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