Installation

Category: Installation, Version 5.x

Please check which major version of SimpleSYN Standard/Business you originally purchased.

If you purchased an older major version (e.g., version 5 or version 4), you probably have the current major version 6 installed. You can view the version number in the main window under "Information."

If this is the case:

Unfortunately, the old licenses are no longer valid for new major versions, hence the message.

Please note: Licenses are offered as a one time payment. There are no additional costs per month/year. The license entitles you to use the licensed version (e.g. version 5.0). Minor updates (eg version 5.0 to version 5.0.1 etc.) are included. Major upgrades to new versions (eg version 5.x to version 6) are subject to a fee, but optional.

If you wish to stay with your current version, first uninstall version 6. Then reinstall the major version you purchased.

You can download older major versions from the following page:
https://www.simplesyn.net/en-US/additional-downloads

After installation, your old license file will be accepted again.

Interested in version 6?

If you would like to upgrade to version 6, you will receive a 20% discount on the same number of licenses.

Simply send us an email to support@simplesyn.net with your order number and the purchase date.

Category: General, Installation, SimpleSYN Mobile, Version 2.x / 3.x

You need SimpleSYN Standard or SimpleSYN Business and also SimpleSYN Mobile.

With SimpleSYN Standard or Business you can synchronize Outlook between multiple Windows PCs. If you still want to synchronize mobile devices (smartphones, tablets), then you also need SimpleSYN Mobile.

With SimpleSYN Mobile you can synchronize Outlook on a Windows PC with up to 5 devices (smartphones, tablets).

Category: Installation, Version 6.x

The classic Outlook for Windows is supported, not the new Outlook app.

The following Outlook® versions are supported:

• Microsoft/Office 365^® with Outlook^® (x86/x64)
• Outlook^® 2024 (x86/x64)
• Outlook^® 2021 (x86/x64)
• Outlook^® 2019 (x86/x64)
• Outlook^® 2016 (x86/x64)
• Outlook^® 2013 (x86/x64)

Category: Installation, Purchase, SimpleSYN Mobile, Version 2.x / 3.x

I have purchased a SimpleSYN Lifetime License Version 2. Can I also use the current version 3 with this license?

SimpleSYN Mobile Lifetime licenses in version 2 are unfortunately not valid for the main version 3.

With a lifetime license, you will not incur any additional costs per month/year. The license entitles you to use the licensed version (e.g. version 2.0) indefinitely. Minor updates (eg version 2.0 to version 2.0.1 etc.) are included. Major upgrades to new versions (eg version 2.x to version 3) are subject to a fee, but optional.

Subscription include upgrades to new main versions in addition to minor updates.

If you are interested in version 3, you can also test the new main version free of charge for 30 days.

Category: Installation, SimpleSYN Mobile, Version 2.x / 3.x

SimpleSYN Mobile by default uses the following network connection. Those must be allowed::

Note: The IP addresses in use may be changing.

Category: Installation, Operation, SimpleSYN Mobile, Version 2.x / 3.x

You do not need any additional apps on the mobile device, not even the Outlook app (not supported).

Use the integrated standard apps of the respective system on your mobile device: :

Category: Installation, Version 5.x, Version 6.x, SimpleSYN Mobile, Version 2.x / 3.x

No, SimpleSYN does not currently support ARM based devices (e.g. Windows RT devices, Surface Pro X etc.). SimpleSYN requires an x86 or x64 version of Windows 10 or newer.

Category: Installation, Version 6.x

SimpleSYN supports the following Windows^® systems and Outlook^® versions:

Microsoft^® Windows^®

• Windows^® 11 (x86/x64)
• Windows^® 10 ab Version 1909 (x86/x64)
• Windows^® Server 2019 (x86/x64)

Microsoft^® Outlook^®

• Microsoft/Office 365^® mit Outlook^® (x86/x64)
• Outlook^® 2024, 2021, 2019, 2016, 2013 (x86/x64)

Important: The classic Outlook for Windows is supported - not the new Outlook app.

Please note:

• An active internet connection is required for synchronization (applies to SimpleSYN Business and Standard).
• All participating Windows PCs must be turned on at the same time for synchronization, as your Outlook data is not stored in the cloud.
• The Windows service is only available in the SimpleSYN Business version. In the SimpleSYN Standard version, a Windows user must be logged on to the computer for synchronization.
• Synchronization of external data sources (e.g. Google Calendar or iCloud) is not supported.

Category: General, Installation, Version 5.x, Version 6.x

In the standard configuration (both in the Business and Standard versions), SimpleSYN requires an active Internet connection. SimpleSYN uses this connection to contact a central server operated by SimpleSYN, which facilitates the connection between the SimpleSYN server and the SimpleSYN client.

Only the information necessary to establish the connection is transmitted — your Outlook data is never stored in the cloud. Afterward, SimpleSYN attempts to establish a direct connection between the participating installations. The best available connection method is selected automatically.

All communication is always encrypted using SSL or TLS. Outlook data is never transmitted in plain text or permanently stored on our servers — it is only forwarded directly and securely.

Why does the Standard version also use this method?
Since most users today have an internet flat rate, we decided to use the central server in the Standard version as well — however, with the limitation that the connection is only established within the local network.

Using SimpleSYN without an Internet Connection

If you would like to use SimpleSYN without an internet connection or without our central server, then there is the option of changing the connection configuration so that our central server is no longer necessary.

Important:
This setting is primarily intended for the Standard version. In the Business version, synchronization will only work within the same local network after switching to this mode — synchronization over the internet will no longer be possible.

How to activate the custom connection (from version 5):

1. Open the SimpleSYN main window.
2. Go to Options > Advanced Options.
3. On all PCs (server and clients), enable the option “Custom connection mode”.
4. On each client, enter the computer name or the static IP address of the SimpleSYN server in the field “Custom server name/address”.

Category: Installation, Troubleshooting, Version 6.x

This message indicates that SimpleSYN cannot be installed on your computer because you are probably using an ARM processor.

SimpleSYN is only compatible with Windows 11 or 10 on computers with classic x86 or x64 processor architectures (Intel or AMD). Installation on ARM-based systems is not supported.

Category: Installation, SimpleSYN Mobile, Version 2.x / 3.x

SimpleSYN Mobile supports the following versions of Microsoft ® Windows ® and Outlook ®.

Requirements for the Windows PC hosting the installation:

• Microsoft® Windows®
  • Windows^® 11 (x86/x64)
  • Windows^® 10, version 1909 or newer (x86/x64)
• Microsoft® Outlook ®
  • Microsoft/Office 365^® mit Outlook^® (x86/x64)
  • Outlook^® 2024, 2021, 2019, 2016 (x86/x64)

Important: The classic Outlook for Windows is supported - not the new Outlook app

For the device you want to synchronize, the following requirements must be met:

• Supports all smartphones and tablet computers based on:
  • Apple iOS, iPadOS version 12 or later 
  • Android version 8 and later

Please note:

• An active internet connection is required for synchronization.
• All participating devices must be turned on at the same time for synchronization, as your Outlook data is not stored in the cloud.

Category: Installation, SimpleSYN Mobile, Version 2.x / 3.x

SimpleSYN Mobile supports the following versions of Microsoft Outlook:

• Microsoft/Office 365^® with Outlook^® (x86/x64)
• Outlook^® 2024 (x86/x64)
• Outlook^® 2021 (x86/x64)
• Outlook^® 2019 (x86/x64)
• Outlook® 2016 (x86/x64)

Important: Classic Outlook for Windows is supported - not the new Outlook app.

Category: Installation, Version 6.x

SimpleSYN supports the following versions of Microsoft Outlook:

• Microsoft/Office 365^® with Outlook^® (x86/x64)
• Outlook^® 2024 (x86/x64)
• Outlook^® 2021 (x86/x64)
• Outlook^® 2019 (x86/x64)
• Outlook® 2016 (x86/x64)
• Outlook® 2013 (x86/x64)

SimpleSYN also works in mixed environments.

Important:
The classic Outlook for Windows is supported, not the new Outlook app.

Category: Installation, Version 5.x, Version 6.x

SimpleSYN requires a unique configuration and a unique certificate for each PC.

SimpleSYN must be completely reset to one of the clients. Then SimpleSYN can be reinstalled and set up.

Follow these steps:

• Uninstall SimpleSYN first under the Windows Control Panel "Programs / Features" or under Apps on Windows 10
• Then enter the following line in Windows Explorer:
  %localappdata%
• Find the folder SimpleSYN here and delete this folder.

Then delete the SimpleSYN certificate as follows:

• Open the Internet Explorer
• Go to "Internet Options"
• Click the "Content" tab
• Click on "Certificates"
• In the next window under "Display name" search for the SimpleSYN entries, mark the respective entry and click on "Remove"

Then you can reinstall SimpleSYN and set it up again. The initial synchronization will be run once again.

Category: Installation, Version 5.x, Version 6.x

You can easily upgrade Outlook to a newer version – there's no need to uninstall the previous version. SimpleSYN will automatically detect the new Outlook version.

Important:
Make sure to install Outlook in the same bit version as before – either 32-bit or 64-bit.

If you want to install Outlook in a different bit version than the previous one, please follow these steps:

1. First, uninstall SimpleSYN.
2. Then, update Outlook.
3. Finally, reinstall SimpleSYN.

Category: Installation, Version 5.x, Version 6.x

No, the versions are not compatible with each other. All installations must have the same major version (e.g. version 6). The minor version (e.g. 6.x or 6.0.x) can be different.

Category: Installation, Version 5.x, Version 6.x

Yes, SimpleSYN can be used on networks that already use a Microsoft Exchange server.

Note: Exchange ActiveSync accounts cannot be synchronized.

Category: Installation, Version 5.x, Version 6.x

An active internet connection is required for synchronization using SimpleSYN Business and SimpleSYN Standard.
SimpleSYN uses this connection to contact a central server operated by SimpleSYN, which facilitates the connection between the SimpleSYN server and the SimpleSYN client.

Only the information necessary to establish the connection is transmitted — your Outlook data is never stored in the cloud. Afterward, SimpleSYN attempts to establish a direct connection between the participating installations. The best available connection method is selected automatically.

If a computer using the SimpleSYN Business version is to be synchronized over the internet, but a direct connection between the SimpleSYN server and client cannot be established — for example, due to firewalls, routers, or NAT — SimpleSYN will use a relay server as a last resort. This allows communication even in networks where only outbound traffic is permitted.

All communication is always encrypted using SSL or TLS. Outlook data is never transmitted in plain text or permanently stored on our servers — it is only forwarded directly and securely.

Note: 
Proxy server support is available starting with SimpleSYN version 5. For older versions, access to our servers at services.simplesyn.net must be explicitly allowed.

SimpleSYN requires the following outbound TCP connections.

Category: Installation, Version 5.x, Version 6.x

No, SimpleSYN does not support Windows RT. SimpleSYN requires a x86 or x64 device, e.g. the Microsoft Surface Pro.

Category: Installation, Version 5.x, Version 6.x

Yes, Microsoft Outlook is an essential requirement for the installation of SimpleSYN.

Category: Installation, Version 5.x, Version 6.x

Yes, SimpleSYN has to be installed on all PCs you wish to synchronize.

Category: Installation, Version 5.x, Version 6.x, Version 2.x / 3.x

You will need to have administrator rights for the installation of SimpleSYN.

Category: Installation, Version 5.x, Version 6.x

SimpleSYN is a Client-/Server application. In your SimpleSYN network one PC must be configured as a server. The SimpleSYN server must be authorized in the Windows Firewall and/or Desktop firewall.

Please make sure that SimpleSYN is allowed in your personal firewall.

SimpleSYN must communicate with our servers located at services.simplesyn.net.

SimpleSYN requires the following outbound TCP connections.

Category: Installation, Version 5.x, Version 6.x

Yes, SimpleSYN  supports Outlook in 64-Bit.