Fixes a crash in the configuration wizard when using custom configurations
Fixes a missing cancel button in the configuration wizard
Fixes a problem in the setup program which prevents the installation of SimpleSYN on some systems
Version 4.0 (Build 8017) released 8/17/2015:
Fixes a crash in the 64bit version when adding a Windows user in the SimpleSYN servers synchronization settings
Fixes a crash after upgrading from version 3.x, if a value is missing in the state database
Fixes a problem in the Windows service component, which prevents SimpleSYN from starting during log on
Advanced Options failed to save if no Outlook session could be created. This also prevented the possibility to choose the right Outlook version
Enhances the status page to reduce flickering when multiple folders are synchronized successively
Fixes a problem that the client only displays “(refreshing name)” on the status page
New Version 4.0 released 8/4/2015
NEW: Supports Windows 10
NEW: Supports Outlook 2016 (as soon as Outlook 2016 is available)
NEW: SimpleSYN can run as a Windows service (Business version)
NEW: Connected clients are displayed on the server
NEW: Additional filter options to exclude items from the synchronization
NEW: Connection type is displayed
NEW: Separate backup location for deleted items and folders
NEW: Synchronized deletions can be restored with the SimpleSYN Add-In
NEW: The Outlook version to use by SimpleSYN can be choosen in the advanced options
Completely revised user interface
Pending synchronization shows the full folder path
Enhancements in the duplicate finder (the columns can be sorted)
SimpleSYN now uses the .NET Framework 4.5
The synchronization performance is improved
The data gets compressed during the synchronization
Reliability of the synchronization is enhanced
Better detection for IMAP folders
Many additional optimizations
Bug fixes
Version 3.5 (Build 7528) released 4/8/2015:
Fixes a connectivity problem if a Firewall or other networking component caused an error while closing a connection
Fixes a crash while using the manual synchronization within the Outlook Add-In
Fixes a problem in which an item may be synchronized twice
Version 3.5 (Build 7326) released 1/29/2015:
Fixes another memory leak in the SimpleSYN client
Version 3.5 (Build 7323) released 1/23/2015:
Fixes a memory leak in the SimpleSYN client
Version 3.5 (Build 7110) released 11/11/2014:
When synchronizing Exchange Server accounts, SimpleSYN was always synchronizing internal changes which leads to a higher synchronization volume. This fix reduces the amount of unnecessary synchronization
SimpleSYN did not detect changes to the read state of items if it was not running. The read state of several items were only synchronized after additional changes occurred on the same folder
Fixes a performance problem when synchronizing many items with the same subject
Optimizations and bug fixes
Version 3.5 (Build 6924) released 9/24/2014:
Fixes a minor display issue in the German version
Version 3.5 (Build 6912) released 9/12/2014:
Fixes a problem that SimpleSYN could sometimes stay offline after losing the internet connection
If the deleted objects folder was missing, SimpleSYN failed to synchronize deletions. The folder is now recreated correctly
The deleted objects folder cannot be synchronized manually anymore
The button for repairing links to contacts is not shown in Outlook 2013 anymore, because Outlook 2013 does not support contact links
Fixes a crash when items have a very large subject line
Better support for high DPI displays
Optimizations and bug fixes
Version 3.5 (Build 6314) released 3/18/2014:
IMAP folders are not shown by default anymore, to avoid faulty synchronization
Exchange ActiveSync accounts in Outlook 2013 are not available for synchronization anymore. The synchronization did not work correctly
The default message store is now displayed correctly
Some new folders could not be used with drag/drop in Outlook, if the message type was not determined correctly
Optimizations and bug fixes
Version 3.5 (Build 6225) released 2/26/2014:
Fixes a problem sometimes preventing SimpleSYN to connect over the internet if multiple static IP addresses are assigned to a network adapter
Optimizations and bug fixes
Version 3.5 (Build 6215) released 2/15/2014:
Fixes a problem which prevents SimpleSYN from starting under Windows 8.1
Version 3.5 (Build 6213) released 2/14/2014:
Fixes a problem which sometimes prevents synchronization of Exchange Server folders
Fixes the interruption of the connection if a folder currently synchronizing was moved
Fixes a crash if an Outlook data file was locked
Adds a missing firewall rule to the Windows Firewall
Better support for very deep folder hierarchies
Optimizations and bug fixes
Version 3.5 (Build 6004) released 12/6/2013:
NEW: Subfolders can be synchronized automatically
Improved selection of subfolders in the synchronization settings
Local folders are now loaded in the background and refreshed automatically
Improved synchronization performance
Improved performance when detecting changes while SimpleSYN is not running, or when settings have changed
Added and removed Outlook data files are shown correctly
Improved log functionality
Improved handling of locked PST files
Fixes a problem where emails with attachments may twice created, when synchronized between different versions of Outlook
Issue in which the SimpleSYN add-in may prevent sending an email is resolved
Fixes a crash when the SimpleSYN server is reinitialized
Fixes a crash when the main SimpleSYN window is closed while searching for available SimpleSYN servers
Enhanced recognition of items during the initial synchronization
Fixes several bugs in the connection establishment
Renaming the SimpleSYN server prevents the connection. Note: SimpleSYN clients must still be reconnected to your SimpleSYN server if the server is being renamed
Optimizations and bug fixes
Version 3.0 (Build 5122) released 3/22/2013:
NEW: The Setup now installs SimpleSYN now automatically with the correct platform e.g., if Outlook 2010 64-bit or Outlook 2013 64-bit is detected, SimpleSYN will be installed in 64-bit too. Otherwise the 32-bit version will be installed
NEW: Allows the usage of custom connection configurations
Fixes a problem where the configuration wizard might hang for a few seconds
Fixes the problem where the SimpleSYN server stays offline
Fixes a problem if unexpected characters are used in the Outlook profile name
Fixes the crash when the security communication between SimpleSYN client and server fails
Fixes the crash when drawing the SimpleSYN main window if some Windows settings changes
Fixes a crash if a PST-file is being locked
Minor optimizations and bug fixes
SimpleSYN Mobile version history
Version 3.6 (Build 14312) released 11/13/2025:
NEW: Improved validation of advanced options to prevent invalid configurations.
Fixed: Crash when closing SimpleSYN if another instance was active.
Fixed: Changes to the message text or notes field of contacts and appointments were sometimes not detected and only synchronized after an additional modification.
Various internal improvements and optimizations.
Version 3.5 (Build 14028) released 8/28/2025:
It is no longer possible to disable both HTTP and HTTPS simultaneously under “Advanced Options,” preventing configuration errors.
A rare crash that could occur when opening or closing data files in Outlook has been resolved.
Improves the behavior when exiting SimpleSYN Mobile
Version 3.4 (Build 13629) released 4/29/2025:
Fixed a synchronization issue with some apps, including 'Task & Notes'.
Fixed an issue where the synchronization process could not be stopped after an Office update.
Version 3.3 (Build 13610) released 4/10/2025:
Fixed an issue with the display of images in synchronized emails.
Fixed a problem where the synchronization process sometimes did not restart after an Office update.
Version 3.2 (Build 13520) released 3/20/2025:
Fixes a potential issue with message body synchronization.
Version 3.1 (Build 13506) released 3/6/2025:
Fixes an issue that caused synchronization to stop unexpectedly.
New Version 3.0 released 2/25/2025
NEW: .NET 8: SimpleSYN Mobile now uses .NET 8.
NEW: Integrated Web Server: Instead of the Windows HTTP service, an independent web server is now used.
NEW: Additional Language Packs: SimpleSYN has been automatically translated into the following languages. Please report errors and suggestions for improvement via the feedback function:
Czech
Danish
Greek
Spanish
French
Italian
Dutch
Polish
Portuguese
NEW: Outlook 2024: Support for Outlook 2024.
Improved reliability with Office updates.
Feedback Function: The feedback function has been improved.
The folder path is now displayed under status.
The password can be displayed during input.
Changes to the hostname are no longer possible when using the HTTP relay service.
Fixes an issue that prevented the "Deleted Items Folder" from syncing, causing deletions from the device to fail.
Version 2.8 (Build 13611) released 4/11/2025:
Fixes an issue that caused synchronization to stop unexpectedly.
Fixed an issue with the display of images in synchronized emails.
Fixed a problem where the synchronization process sometimes did not restart after an Office update.
Version 2.7 (Build 13115) released 11/15/2024:
Fixes a bug that sometimes caused the initial setup dialog to not be displayed.
Version 2.6 (Build 12417) released 4/26/2024:
Fixes a compatibility issue with Samsung apps and improves the reliability of the synchronization in general.
Version 2.5 (Build 12321) released 3/22/2024:
Fixes an issue when moving an item from one folder to another. This also applies to deleting an item from an device.
Version 2.4 (Build 12214) released 2/14/2024:
Changes behavior in the event of potential conflicts. If an item is changed in Outlook, simultaneous changes are now still applied by the end device, as long as no synchronized data fields have been changed. For any other change, conflict resolution is left to the end device. As a rule, this means that the changes are copied from Outlook and changes to the end device are overwritten.
Changes the behavior when an device sends unexpected or additional data fields. This data will now be ignored and the synchronization will continue. Previously, the synchronization of the affected item was rejected with an error.
Fixes an error when synchronization reply-to email recipients in the x64 version.
Fixes a possible vulnerability in the SimpleSYN installer component.
Changes of the available CALs are now applied in a more timely manny, without the need of a manual activation.
Minor bug fixes and optimizations.
Version 2.3 (Build 11920) released 11/20/2023:
Fixes an issue that prevented a retrial period when upgrading from version 1 to version 2. If you have purchased a lifetime license for SimpleSYN v1, you can now test it again free of charge for a full 30 days after installing v2.
Deleting a device's sync status may only work if sync was manually disabled in advance.
The "Configuration" page has been improved when using a large number of user accounts.
Version 2.2 (Build 11818) released 10/18/2023:
When SimpleSYN Mobile and the sync process are running as administrator, the sync process was not detected as started. The status display of the end devices was also not available. Note: We recommend that you do not run SimpleSYN and Outlook as administrators for security reasons.
Version 2.1 (Build 11806) released 10/6/2023:
Addresses a compatibility issue that arises when using iOS 17, where certain appointments were displayed as meeting invitations instead of regular appointments. Note: If your appointments were erroneously synchronized, please disable calendar synchronization in your iOS device's account settings and then re-enable it.
