How to uninstall the software

CodeTwo Email Signatures for Office 365 runs entirely in the cloud and is managed via a web browser. However, some of its optional components are either deployed in the Microsoft 365 admin center to selected users (e.g. the modern CodeTwo Signatures Web Add-in for Outlook) or installed locally (the classic CodeTwo Signatures Add-in for Outlook). The Outlook add-ins are necessary only if you are using the program in client-side or combo mode. Uninstalling the product completely means that you deregister your tenant from our services (which includes cancelling your subscription), remove the software's components installed on Microsoft Azure servers as well as uninstall all components from your local computer.

There might also be cases when you wish to temporarily stop the program from adding email signatures without canceling your subscription, and this article mentions such scenarios as well. Finally, remember that CodeTwo Email Signatures for Office 365 can run in three modes, so you need to choose the uninstallation procedure applicable to the way you run your software. Click the links below to read more.

• How to completely uninstall CodeTwo Email Signatures for Office 365 working in server-side mode
• How to completely uninstall CodeTwo Email Signatures for Office 365 working in client-side mode
• How to completely uninstall CodeTwo Email Signatures for Office 365 working in combo mode
• How to automatically remove connectors and transport rule for a Microsoft 365 (Office 365) tenant
• How to manually remove connectors and transport rule in Microsoft 365 (Office 365)

How to uninstall CodeTwo Email Signatures for Office 365 working in server-side mode

Uninstall the desktop components

First, if you've been using any desktop components of CodeTwo Email Signatures for Office 365 you need to uninstall them from your local computer. This applies to the Manage Signatures App (deprecated) and Custom Attributes Sync App (deprecated).

1. Go to your Windows Control Panel.
2. Click on Programs and Features (or Add or Remove Programs in older Windows versions).
3. Find CodeTwo Email Signatures for Office 365 - Manage Signatures App on the list, right-click on it and choose Uninstall.
4. Follow the uninstaller wizard to remove the application(s).
5. If you've been using the Custom Attributes Sync App, uninstall it in the same way.

Deregister your tenant

Next, you need to deregister your tenant from our services. Open the CodeTwo Admin Panel and go to the management page of your tenant by clicking the Manage tenant () button next to the tenant's name (Fig. 1.).

Fig. 1. Tenants card in the CodeTwo Admin Panel.

Select Deregister from the left menu (Fig. 2.) and click Deregister tenant [Name].

Fig. 2. Deregister tenant window.

This will start a wizard that will delete the transport rule and the connectors added by CodeTwo in your Microsoft 365 (Office 365) tenant and will also remove any associations with your tenant in the CodeTwo Email Azure Service. To delete the transport rule and the connectors, the wizard will provide you with a temporary code to associate our service with your account for use on the Microsoft sign-in page. After entering the code, sign into your Microsoft 365 tenant as usual by providing your global admin credentials.

Remove the CodeTwo domain

After you have performed all the above steps, you will notice that the unique CodeTwo domain (which was assigned to you during the provisioning of our services) is still visible in your Microsoft 365 admin center (Office 365 admin center) (Fig. 3.). You can delete it from there. Still, we recommend that you leave this domain - it does not influence your mail flow but allows us to quickly restore your settings if you want to resume our services.

Fig. 3. Removing the CodeTwo domain in Microsoft 365 admin center.

Remove CodeTwo data from your Azure Active Directory

The last step is to remove software entries from your Azure Active Directory (Azure AD). To do that, follow the guidelines below.

1. Open Azure Active Directory admin center (or Azure portal - the UIs are similar so the guidelines below apply to both portals). You can also access the Azure AD admin center by signing in to your Microsoft 365 admin center and navigating to Admin centers > Azure Active Directory.

2. Click Azure Active Directory on the menu (Fig. 4.).

Fig. 4. How to access Azure Active Directory settings in Azure AD admin center.

3. Navigate to Enterprise applications > All applications. You can see several CodeTwo entries on the list (Fig. 5.). The number of CodeTwo apps displayed might vary depending on your configuration (for example, if you used Sent Items Update, you will see more CodeTwo entries).

Fig. 5. CodeTwo application entries in Azure AD.

4. Click one of the CodeTwo apps on the list and open its Properties page. There, you can remove the application by clicking the Delete button (Fig. 6.).

Fig. 6. Deleting an application from Azure AD.

5. Repeat this for all apps whose names begin with CodeTwo Email Signatures for Office 365.
6. Now go back to the Azure Active Directory settings (see Fig. 4.) and open the App registrations section from the menu. A list of application registrations is shown (if nothing is displayed, click View all applications).
7. Find all entries associated with CodeTwo Email Signatures for Office 365 or CodeTwo Sent Items Update (Fig. 7.) and remove them by clicking on the entry and selecting Delete in the Overview page.

Fig. 7. CodeTwo application registrations in Azure AD.

Uninstall the signatures preview add-in (CodeTwo Signatures Web Add-in for Outlook)

See this section to learn how to remove the Web Add-in centrally via the Microsoft 365 admin center. 

Remove the cache files of the desktop apps

After you uninstall the ClickOnce applications, the apps' temporary files and your signature templates might still remain on your local disk. If you want to remove those files, delete the following folders:

C:\Users\<username>\AppData\Local\CodeTwo\CodeTwo Email Signatures for Office 365 (if you used the Manage Signatures App)
C:\Users\<username>\AppData\Local\CodeTwo\CodeTwo Email Signatures for Office 365 Custom Attributes Sync (if you used the deprecated Custom Attributes Sync app)

The locations above might differ, depending on your environment.

How to uninstall CodeTwo Email Signatures for Office 365 working in client-side mode

Remove CodeTwo signatures add-in for Outlook

• Uninstall the classic CodeTwo Signatures Add-in for Outlook (COM Add-in)
• Uninstall the modern CodeTwo Signatures Web Add-in for Outlook

Uninstall the COM Add-in

First, sign in to app.codetwo.com, turn off all your client-side signature rules and save the changes. This will clear all CodeTwo signatures on the computers of users who have been using the CodeTwo Signatures Add-in for Outlook.

Then, you need to uninstall the CodeTwo Signatures Add-in for Outlook. If the add-in was installed manually, you need to instruct your users to uninstall it from their computers the same way as you uninstall other CodeTwo desktop components.

If you deployed the add-in with Microsoft Intune, go to this article to learn how to uninstall it for all users or group(s) of users in your organization.

If you installed the CodeTwo Signatures Add-in for Outlook for multiple users with GPO, you can uninstall it from all machines at once by following these steps:

1. Press Win + R to launch the Run console, type gpmc.msc and click OK (Fig. 10.) to open the Group Policy Management Editor.

Fig. 10. Accessing the Group Policy Management Editor.

2. Find the GPO you used to deploy the CodeTwo Signatures Add-in for Outlook and edit it (Fig. 11.).

Fig. 11. Editing the GPO used to install the add-in.

3. In the GPO settings, go to User Configuration > Policies > Software Settings > Software installation, right-click the software package you used to deploy the add-in and click All Tasks > Remove (Fig. 12.).

Fig. 12. Removing the add-in’s software package.

4. Choose the option to Immediately uninstall the software from users and computers (Fig. 13.) and click OK to confirm.

Fig. 13. Choosing the option to uninstall software package immediately.

5. The add-in should be uninstalled from users’ profiles on the next logon. To speed it up, users can use Command Prompt or PowerShell to force the Group Policy update with the gpupdate /force command (Fig. 14.) The console can log off the user automatically, so that the logon script can uninstall the add-in right away.

Fig. 14. Forcing a Group Policy update.

Once you've uninstalled the COM Add-in, proceed to this step.

Uninstall the Web Add-in

The CodeTwo Signatures Web Add-in for Outlook is deployed centrally to selected users via the Microsoft 365 admin center. To remove the Web Add-in for these users, follow the steps below: 

1. Sign in to the Microsoft 365 admin center. Note that only the admin who deployed the Web Add-in or a global admin can remove it.
2. Go to Settings > Integrated apps.
3. Select CodeTwo for Outlook (or CodeTwo Signatures) from the list of apps and click Remove app in the pane that opens (Fig. 15.).

Fig. 15. Removing the CodeTwo Signatures Web Add-in for Outlook in the Microsoft 365 admin center.

4. Confirm the remove request and click Remove. 

The Web Add-in will be automatically removed from both Outlook desktop clients and Outlook on the web (OWA).

Uninstall the desktop components

Next, if you've been using any desktop components of CodeTwo Email Signatures for Office 365 you need to uninstall them from your local computer. This applies to the Manage Signatures App (deprecated) and Custom Attributes Sync App (deprecated) as well as the CodeTwo Signatures Add-in for Outlook (COM Add-in).

1. Go to your Windows Control Panel.
2. Click on Programs and Features (or Add or Remove Programs in older Windows versions).
3. Find your CodeTwo application on the list:
   • CodeTwo Email Signatures for Office 365 - Manage Signatures App
   • CodeTwo Signatures Add-in for Outlook
   right-click it and select Uninstall.
4. Follow the uninstaller wizard to remove the application(s).
5. If you have the CodeTwo Signatures Add-in for Outlook (COM Add-in) installed, and it's not been removed by your organization via GPO (see above), uninstall it in the same way.
6. If you've been using the Custom Attributes Sync App, uninstall it in the same way.

Deregister your tenant

Finally, you need to deregister your tenant from our services. Open the CodeTwo Admin Panel and go to the management page of your tenant by clicking the Manage tenant () button next to the tenant's name (Fig. 16.).

Fig. 16. Tenants card in the CodeTwo Admin Panel.

Select Deregister from the left menu (Fig. 17.) and click Deregister tenant [Name].

Fig. 17. Deregister tenant window.

This will start a wizard that will cancel the tenant's subscription and the tenant will be removed from the CodeTwo Admin Panel.

How to uninstall CodeTwo Email Signatures for Office 365 working in combo mode

Combo mode is a combination of server-side and client-side solutions.

First, remove CodeTwo signatures add-in for Outlook as described here.

Then, follow the uninstall instructions for the server-side mode.

How to automatically remove connectors and transport rule for a Microsoft 365 tenant

By default, when you deregister your tenant from the CodeTwo Email Azure Service (as described above) this also cancels your subscription. If you wish to temporarily or completely stop our service from adding signatures to your emails, but want to keep your subscription, follow the instructions below to remove the software's Exchange Online connectors.

Open the CodeTwo Admin Panel. Navigate to the management pages of a chosen tenant by clicking the Manage tenant () button next to the tenant's name (see Fig. 1.).

Select Exchange Online connectors on the left menu and click Remove connectors (Fig. 18.).

Fig. 18. Exchange Online connectors window.

This starts a wizard that will delete the transport rule and connectors added by CodeTwo in your Microsoft 365 tenant. In the second step of the wizard, a temporary authorization code will be provided that needs to be used to associate our service with your account. Use it on the Microsoft sign-in page that will be displayed once you click Authorize. Then, sign into your Microsoft 365 tenant as usual by providing your global admin credentials.

Since you are still registered with CodeTwo, you can continue editing your signature rules. Note that this will not affect your emails at all, because there are no connectors configured, which is required to forward your emails to CodeTwo Email Azure Service for processing.

If you wish to restore the processing of emails by CodeTwo Email Signatures for Office 365, simply go back to the Exchange Online connectors section, click the Configure connectors button (Fig. 18.) and proceed with the connectors configuration wizard.

How to manually remove connectors and transport rule in Microsoft 365

1. Sign in to Exchange admin center and go to Mail flow > Rules.
2. Select the CodeTwo transport rule and delete it (Fig. 19.).

Fig. 19. Removing the CodeTwo transport rule.

3. Now, click Connectors in the menu on the left. Select the CodeTwo inbound connector and delete it. Then, select and delete the CodeTwo outbound connector (Fig. 20.).

Fig. 20. Removing CodeTwo connectors.