> For the complete documentation index, see [llms.txt](https://docs.secumailer.com/manuals/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.secumailer.com/manuals/appendices/exclaimer-1.md).

# CodeTwo

### Introduction

CodeTwo is a Microsoft Office 365, Exchange Server and G Suite solution for email signatures, archiving, email utilities & more.  

It's possible to have CodeTwo and SecuMailer cooperate together to enjoy the benefits of both solutions. This appendix contains instructions for the proper setup of CodeTwo together with SecuMailer.

### Exchange Admin Center 

Please open a browser and provide the URL for your Exchange Admin Center.

![Exchange Admin Center home screen ](/files/-Lq5D9E3UjYyTXFZJOAM)

In EAC select `mail flow` in the main menu and subsequently select `rules` from the context menu. In the rules overview move the CodeTwo rule above the SecuMailer rule(s) using the up arrow in the rules menu (see screenshot below).

![Rules menu](/files/-ME1zt7DwK9lGT7mpw8a)

### Mail flow rule

After you've moved the CodeTwo rule above the SecuMailer rule(s), select the edit option to change the SecuMailer rule(s).

Change the first condition `Apply this rule if...` , add a condition by selecting `A message header...` from the drop down and select `includes any of these words...`

Click on `Enter text...` , fill in **X-CodeTwoProcessed** and click on `OK`. Click on `Enter words...`, fill in **true**, click on the `+` symbol and click on OK. See below for an example.

<figure><img src="/files/1ZAm7vUE33MA11nx7JwV" alt=""><figcaption></figcaption></figure>

Click on `Save` to store the change.

This change ensures that O365 / Exchange checks that the CodeTwo processing has completed successfully before sending the email to SecuMailer for further processing.