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Supported platforms and requirements

Sigsync Email Signatures for Office 365 is a centralized, web-based solution that does not require any additional components to be installed in your environment. It is platform independent and can be accessed from a browser on any device, including Windows desktop, Android phones, iPhones, iMacs, and Linux.

Below is a list of system requirements and required permissions for configuring and managing email signatures using Sigsync.

Sigsync Dashboard

  • A modern and latest web browser such as Google Chrome, Firefox, Opera, Safari or Microsoft Edge to access the Sigsync dashboard seamlessly.
  • Microsoft 365 (Office 365) Global admin rights required to register the Office 365 tenant and configure signatures. Sigsync employs Microsoft OAuth 2.0 and TLS encryption for authenticating your credentials. During the login, you will be directed to Microsoft's sign-in page for authentication. Your Office 365 login details are neither stored on Sigsync nor on any third-party servers, and your emails are not accessed by anyone.
  • A Microsoft 365 (Office 365) plan that includes Exchange online (Access to Exchange Transport Rules and Connectors needed; Sigsync supports Microsoft F1 and Kiosk plans as well).
  • Sigsync also supports Microsoft 365 trial subscriptions. With the Microsoft 365 trial subscription, you can register the tenant with Sigsync and test client-side signatures.

Sigsync Signatures Add-in for Outlook

For Windows:
  Windows Outlook for Microsoft 365 (Version 2108 - Build 14326.21018) and higher (Microsoft 365 subscription required)
 Outlook 2019 (Version 2111) and higher – partially supported*
 Outlook 2021 – partially supported*
 Windows 10 (Version 1903 - Build 18362) or Windows Server 2019 (Version 1903) and higher – older versions are partially supported*
*partially supported means that with the Sigsync Add-in you can:
  preview signatures from add-in pane while composing an email
  add signatures manually from the add-in pane using 'Add This Signature' button

For Mac (early access version of the Sigsync Add-in):
 Outlook for Mac (Version 16.59 - Build 22031300) and higher (Microsoft 365 subscription required)

Please note that the 'New Outlook' toggle located in the upper-right corner of Outlook for Mac must be switched to 'On'. In case the toggle is not visible, you can click on 'Outlook' in the menu bar and select 'New Outlook' to activate it.

Outlook on the web (OWA): 
Sigsync Signatures Add-in for Outlook is compatible with all modern web browsers such as
  Google Chrome
  Microsoft Edge
  Mozilla Firefox

Outlook on Mobile Devices (Android and iOS):
  Outlook for Android – version 4.2330.0 and later
  Outlook for iOS – version 4.2314.0 and later
Click here to know more details on Outlook for Android version
Click here to know more details on Outlook for iOS version

Although the Sigsync Signatures Add-in for Outlook can be used with shared mailboxes, full support may not be available on Outlook Mac. This is because shared mailboxes are not yet officially supported on Microsoft's Office Add-in platform.
Sigsync requires Microsoft 365 global admin rights (required for centralized deployment of the Sigsync Signatures Add-in only).

Important Notes:

  • Sigsync supports signatures to emails sent from aliases (using an alias address as the email sender). Read More
  • Signatures to Shared mailboxes are fully supported in server-side mode.
  • Signatures to emails sent with 'Send As' or 'Send on Behalf' permissions are supported. Read More
  • In hybrid Exchange environments, Sigsync can process emails going through Microsoft 365 servers and attach the signatures.
  • Sigsync supports signatures to DKIM-signed Microsoft emails.
  • Email Signatures for Sent Items are supported. Read More
  • MultiFactor Authentication (MFA) is supported for login. Read More


Streamline Email Signature Management with a Free On-demand Demo from Sigsync

Sigsync email signature service provides effortless, centralized signature management for Office 365 and Exchange. Our team can assist you in quickly setting up company-wide signatures. Request a free on-demand demo to see how Sigsync can simplify your email signature management process.


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