Knowledge Base

CodeTwo signatures in Outlook for iOS and Android (Early access)

CodeTwo Outlook Web Add-in now supports Outlook for iOS and Android. This article describes how to get automatic signatures directly in Outlook mobile apps as users type their emails.

Important

This feature is currently available in Early access.

Supported platforms and requirements

Supported Outlook apps:CodeTwo Outlook Web Add-in works only on Outlook for iOS and Android with a Microsoft 365 subscription. To ensure smooth experience, make sure you're using the most recent version of mobile Outlook.
Requirements:CodeTwo Email Signatures 365 needs to work in Outlook (client-side) or combo* mode. You also need to deploy the modern CodeTwo Outlook Web Add-in to users in your organization who should get CodeTwo signatures. The deployment is fully automated & centralized; no end-user installation required.

Important 

In combo mode, if you enable CodeTwo Web Add-in for Outlook mobile apps, all emails sent from mobile devices will be routed through the CodeTwo service, located in the Azure region of your choice. The service will verify whether or not a cloud (server-side) signature should be added to the outgoing email (only if the email doesn't already have a CodeTwo signature added by the add-in). This is required to avoid getting two signatures in one email. 

If you don't want your email to be routed through the CodeTwo service at all, use Outlook (client-side) mode instead.

See also: How does CodeTwo Email Signature 365 work?

Enabling CodeTwo Outlook (client-side) signatures for Outlook mobile

  1. Sign in to CodeTwo Admin Panel.
  2. Select your tenant on the Tenants page, go to Outlook add-in, and click Show advanced options (Fig. 1.).

Accessing advanced add-in options in CodeTwo Admin Panel.
Fig. 1. Accessing advanced add-in options in CodeTwo Admin Panel.

  1. Select the Early access: add CodeTwo signatures also in Outlook for iOS and Android option and click Apply. Note that changes to these settings may take up to 4 hours to propagate.

Enabling CodeTwo Outlook signatures for Outlook for iOS and Android.
Fig. 2. Enabling CodeTwo Outlook signatures for Outlook for iOS and Android.

Using CodeTwo Outlook Web Add-in on mobile devices

First, you need to create at least one Outlook (client-side) signature rule, as described here. In the Logic step of the rule creation wizard, be sure to set this signature as the default one for new emails and/or replies and forwards, as shown in Fig. 3. Once your signature rule is saved and published, the signature will become available for the users specified in the rule. 

Setting a signature as default for new emails and replies/forwards.
Fig. 3. Setting a signature as default for new emails and replies/forwards.

CodeTwo signature is added automatically as soon as users start composing an email in their Outlook mobile app (Fig. 4.).

Once the add-in adds a CodeTwo signature to an email, it also disables (removes) a signature set up in an Outlook mobile app.

CodeTwo signature added to an email composed in Outlook for Android.
Fig. 4. CodeTwo signature added to an email composed in Outlook for Android.

If you set up a default signature for replies/forwards, it will be added when a user taps the Reply or Forward button. When replying to an email in Outlook mobile, the quick reply box opens. The CodeTwo signature will not be shown in this box, but it still will be added to the email being composed. To view the signature, click the button to open the full compose view (Fig. 5.).

Opening the full compose view for a reply in Outlook for Android.
Fig. 5. Opening the full compose view for a reply in Outlook for Android.

Tip

If you don't want to open the full compose mode only to make sure a CodeTwo signature was added to an email, you can enable add-in notifications in Outlook mobile apps, as described here.

Enabling add-in notifications shown in Outlook mobile

By default, CodeTwo Web Add-in shows only critical notifications (if something goes wrong) in Outlook mobile. If you want to receive non-critical notifications as well (as shown in Fig. 6.), access the advanced add-in options in CodeTwo Admin Panel (as described above), select the checkbox next to Show add-in notifications displayed above emails in compose mode in Outlook for iOS and Android and click Apply. Note that changes to these settings may take up to 4 hours to propagate.

An example of a notification shown by CodeTwo Web Add-in in Outlook for Android.
Fig. 6. An example of a notification shown by CodeTwo Web Add-in in Outlook for Android.

Troubleshooting & FAQ

This section provides FAQ on using CodeTwo Web Add-in with Outlook for iOS & Android. For more general information about the Web Add-in and deployment instructions, see this article instead.

  1. A CodeTwo signature is not added to emails in Outlook mobile. Why?
  2. How to open the add-in's pane in Outlook mobile?
  3. Can users switch between different CodeTwo signatures in Outlook mobile?
  4. Can I have different signatures set as default ones for different Outlook apps (desktop and mobile)?
  5. Why is an email signature removed when changing an account in the From field in Outlook mobile?
  6. Is there a way to add a CodeTwo signature in Outlook mobile when sending an email from a shared mailbox?
  7. How are CodeTwo signatures added to emails in Outlook mobile when using the combo signature mode?
  8. The signature layout is off in Outlook mobile. Why?
  9. Can organizations on the Microsoft 365 Government GCC plan use the add-in in Outlook mobile?

1. A CodeTwo signature is not added to emails in Outlook mobile. Why?

There may be a couple of reasons why users don't get their signature:

  • You've just enabled CodeTwo signatures for Outlook mobile (as described above). It may take up to 4 hours for this change to propagate.
  • You didn't create an Outlook (client-side) signature rule, the rule is inactive or doesn't include all the users who should get a signature from CodeTwo.

    You can also use the signature rules tester to find out why your signature is not added.

  • The signature is not set as the default one for new messages and/or replies, as shown in Fig. 3.
  • You are sending an email from a shared mailbox (shared mailboxes are not yet supported by the add-in due to limitations of the Outlook API). See also this FAQ.
  • You use combo mode, and switched to cloud signatures in the add-in in Outlook desktop or OWA. See how it works 
  • You have no CodeTwo Email Signature 365 licenses left.
  • Your Microsoft 365 tenant is not registered to CodeTwo.
  • You aren't using the latest mobile Outlook version.
  • You have no internet connection.
  • Your organization is on the Microsoft 365 Government GCC plan, but you haven’t completed these additional steps.

See also: How to troubleshoot issues with signatures not added to emails in Microsoft 365

2. How to open the add-in's pane in Outlook mobile?

The pane is only available for the desktop and web versions of Outlook. This is by design, due to the limitations of Outlook mobile apps.

3. Can users switch between different CodeTwo signatures in Outlook mobile?

Each user can only have one default Outlook (client-side) signature set up for new emails and one for replies/forwards. Natively, it is possible to set up only one email signature in Outlook mobile.

Note that if you have more than one signature set as the default one (e.g. for new emails) for the same user, the user will get the signature that is higher on the list in the signature management app

4. Can I have different signatures set as default ones for different Outlook apps (desktop and mobile)?

No, Outlook (client-side) signature rules configured in the signature management app (app.codetwo.com) apply to all Outlook apps (clients). You can define one default signature per user for new emails and one for replies/forwards.

It is also recommended to use the same signature when sending emails from different Outlook apps (or email apps in general) – consistent signature provides unified brand experience. 

5. Why is an email signature removed when changing an account in the From field in Outlook mobile? 

This is a limitation of Outlook mobile apps and is not related to CodeTwo Outlook Web Add-in. 

6. Is there a way to add a CodeTwo signature in Outlook mobile when sending an email from a shared mailbox?

Yes. You can switch to combo signature mode (see how to do this) and use Outlook (client-side) signatures when sending an email from user mailboxes, and cloud (server-side) signatures when sending an email from a shared mailbox. In the case of the latter, CodeTwo signature will be added in the cloud, after an email is sent from Outlook mobile.

See also: How to add signatures to emails sent from shared/group mailboxes

7. How are CodeTwo signatures added to emails in Outlook mobile when using the combo signature mode? 

If a user gets an Outlook (client-side) signature in their Outlook mobile app, they won't get a second (cloud) signature from CodeTwo.

If a user doesn't get an Outlook signature in their Outlook mobile app or removes the signature manually from an email, then a cloud (server-side) signature will be added to the email.

Both scenarios assume that both CodeTwo Outlook and cloud signatures are set up for the user in the signature management app (app.codetwo.com).

8. The signature layout is off in Outlook mobile. Why?

This is a known bug in Outlook for iOS and Android, which will be addressed by Microsoft. You can find additional information here.

9. Can organizations on the Microsoft 365 Government GCC plan use the add-in in Outlook mobile?

Yes, it's possible, but you need to additionally enable support for mobile Outlook add-ins in Microsoft 365, as it is disabled by default. Proceed as follows:

  1. Connect to Exchange Online via PowerShell, as described here.
  2. Run the following cmdlet:
    Set-OrganizationConfig -OutlookMobileGCCRestrictionsEnabled $false
  3. Disconnect Exchange Online, running the following cmdlet:
    Disconnect-ExchangeOnline
  4. Wait up to 48 hours for the changes to propagate.
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