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Signature 365 system requirements

Signature 365 is compatible with the following plans, directories, servers and clients:

Microsoft 365 plans

  • Microsoft 365 Business Basic
  • Microsoft 365 Business Standard
  • Microsoft 365 Business Premium
  • Microsoft 365 E3
  • Microsoft 365 E5
  • Microsoft 365 F3
  • Microsoft 365 GCC
  • Office 365 A1
  • Office 365 A3
  • Office 365 A5
  • Office 365 E1
  • Office 365 E3
  • Office 365 E5
  • Office 365 F3

Directories

  • Azure AD
  • Active Directory (coming soon)

Mail servers (server-side signatures)

  • Exchange Online
  • Exchange Server 2013 CU21 or later, 2016 CU11 or later, and 2019

Mail clients (client-side signatures)

  • Outlook for Windows version 2104 build 13929.20296 or later required
  • Outlook for Windows version 2110 build 14527.20226 or later recommended
  • Outlook for Mac version 16.56 (21121100) or later required
  • Outlook for Mac version 16.59 (22031300) or later recommended
  • Outlook on the Web

Mail clients (signature preview for server-side signatures)

  • Outlook for Windows
  • Outlook for macOS
  • Outlook on the Web

Signature 365 portal browser support

  • Google Chrome
  • Microsoft Edge based on Chromium
  • Mozilla Firefox
  • Apple Safari on Mac

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