The Letsignit Add-in for Outlook lets you easily deploy signatures simultaneously to all your collaborators on Outlook Windows, MacOS, One Outlook , Outlook Web (OWA) and also on mobile devices (iOS and Android).
Deployment
No action is required on the part of the end user.
If the Letsignit Add-in has already been deployed on your workstation, it will automatically be available on your mobile.
If you have not yet deployed the Letsignit Add-in to your employees, click here to deploy the Letsignit Add-in.
Requirements
Outlook application version
The required version of the Outlook application must be at least 4.2424.0
A more recent version is required for the Internal Audience feature on cell phones
Android (Version 4.2425.0)
iOS (Version 4.2425.0)
Some policies configured on Microsoft Entra ID may cause authentication errors.
To find out your application version:
Go to the "Help and comments" section, the application version is shown at the bottom of the page.
Check that the Add-in is visible in the add-ons
How do I know if the Letsignit add-in has been lowered on my mobile?
In the Outlook application (Android or iOS)
Go to the Settings / Add-ins section
Search for Letsignit Add-in among all the add-ins, it must appear checked.
Which Add-in functions are compatible on mobile phones?
On mobile devices, users do not have access to the taskpanel (the side panel that allows them to modify their attributes, choose other signatures and campaigns from among all those available, etc.).
However, the actions they perform in the taskpanel from Outlook Desktop or OWA will be automatically taken into account on their mobile (see table below).
| Mobile compatibility |
Transparent authentication (M365 SSO) |  |
Automatic insertion of the main signature in the email (new message, reply/forward) |  |
Preview signature before sending |  |
Embedded images |
|
Internal audience detection | 
|
View and change contact details |  No taskpane available on mobile |
Choose manually another signature or campaign | No taskpane available on mobile |
Default user-defined signature |  The user can't set a signature by default on mobile (because no taskpane) |
Automatic signature change depending on sender |
 |
Co-existence with SMTP
If the SMTP connector is already activated on the server side, there is no risk of double-signing. The Add-in takes over and inserts the signature into the email without conflict.
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