Outlook (Classic) agent release notes

Signature 365 Agent 2.3.2 build 335 released August 2, 2025

• Update: Added support for new settings to set default signatures for all profiles and all accounts (#2532)
• Update: Updated to use latest API specifications (#2532)

Signature 365 Agent 2.3.1 build 334 released February 2, 2025

• Update: Minor improvements to credentials code (#2520)

Signature 365 Agent 2.3.0 build 333 released October 28, 2024

• Update: Improved certificate code and handling (#2506)
• Update: Improved reporting if images fail to download (#2491)
• Fix: Authentication with custom domain branding generates a script error (#2498)
• Fix: Unexpected exception may occur when downloading images (#2473)

Signature 365 Agent 2.2.3 build 328 released March 11, 2024

• Fix: Images may fail to download to local machine (#2425)

Signature 365 Agent 2.2.2 build 327 released January 23, 2024

• Update: Better handle authentication token response errors (#2309)
• Update: Upgraded user interface controls to latest version (#2314)
• Update: Upgraded HTTPS client library (#2330)

Signature 365 Agent 2.2.1 build 318 released May 1, 2023

• Update: Installer custom action assemblies are now digitally signed (#1787)
• Fix: Possible null reference exception when acquiring authentication token silently (#1715)
• Fix: Not using Windows proxy settings (#2067)

Signature 365 Agent 2.2.0 build 314 released March 9, 2023

• Update: Installer verifies .NET 4.7.2 or later is installed (#1558)
• Update: Status monitor shows details of any images that fail to download (#1005)

Signature 365 Agent 2.1.1 build 311 released Jan 4, 2023

• Fix: Login prompt occurring again after having successfully authenticated previously (#1565)
• Fix: Login not working reliably on Remote Desktop Services and Citrix (#1565)

Signature 365 Agent 2.1.0 build 309 released Oct 18, 2022

• Update: Improved support for Azure joined workstations (#1253)
• Fix: Browser errors during authentication when using third-party solutions such as Duo security (#1349)

Signature 365 Agent 2.0.3 build 303 released Apr 22, 2022

• Fix: Signature update may intermittently fail with authentication error (#1169)

Signature 365 Agent 2.0.2 build 300 released Apr 12, 2022

• Fix: No longer attempts WAM authentication on older operating systems where not supported (#1164)

Signature 365 Agent 2.0.1 build 297 released Feb 15, 2022

• Update: Remembers account in situations where user has multiple and must choose manually (#1072)

Signature 365 Agent 2.0.0 build 296 released Feb 8, 2022

• Update: Built for .NET Framework 4.7.2 or later and this is now a system requirement (#988)
• Update: Added support for WAM authentication (#989)

Signature 365 Agent 1.0.3 build 291 released Dec 2, 2021

• Fix: Removes "Send Pictures With Document" registry value to fix campaign tracking not working (#850)
• Fix: Removes read-only flag on existing signature files when disabling "Prevent changes" setting (#931)
• Fix: Shows "User not found" error instead of "404 not found" when user does not exist in tenant (#871)
• Fix: Images may have incorrect size when image width and/or height not specified in HTML (#881)
• Fix: Signature update may intermittently fail due to using expired authentication token (#892)
• Fix: No longer requests scope when exchanging authentication token (#923)

Signature 365 Agent 1.0.2 build 284 released Oct 1, 2021

• General availability release