@TheMightyArrow, try the below possible solutions one-by-one:

Try restarting your computer and then verifying the integrity of the game cache for Arma 3.

1. Restart your computer and launch Steam
2. From the Library section, right-click on the game and select Properties from the menu.
3. Select the Local files tab and click the Verify integrity of game cache... button.
4. Steam will verify the game's files - this process may take several minutes.

If you are using mods then make sure that the server that you are trying to join supports all of the mods you have loaded.

Also try repairing the mod(s) via the Arma 3 Launcher:

1. Click "MODS."
2. Click the dropbox arrow next to the mod to repair.
3. Click the "..." icon.
4. Click "Repair."

If you are not using mods then make sure that the server that you are trying to join is not using and does not require any mods.

If the issue persists after trying all of the above possible solutions then use the Arma 3 Launcher to prepare a troubleshooting report and then upload the report to the feedback tracker for the developers to review.

For issues regarding Arma 3 you can file a troubleshooting report, also via an action available in the option menu in the upper right corner (gear icon)

Be sure to upload the whole report file. If the report file will not upload directly to the feedback tracker then try uploading to a free file sharing service such as Dropbox, Microsoft OneDrive, Google Drive, Mega.nz, and so forth, and then link to the report file.

Here is the report, since non of the other things worked to fix the problem.

== "C:\Program Files (x86)\Steam\steamapps\common\Arma 3\arma3.exe" -noSplash -window -name=Arrow10w -cpuCount=2 -exThreads=2 -high -maxMem=2047 -noPause -noSplash -world=empty -mod=

Your launch parameters are a little wonky.

-noSplash is listed twice.

-exThreads= should be 0 or an odd number from 1 to 7. For more information see Arma 3 Startup Parameters on the Bohemia Interactive Community Wiki.

-high is not a valid launch parameter and can be removed.

I wonder if the issue you are experiencing is caused by specific ports being blocked by a firewall or perhaps an anti-virus program interfering with the game. I hope that the developers can shed more light on this.

I changed the launch parameters, nothing changed. Still getting kicked, any other idea?

In T122719#1562967, @TheMightyArrow wrote:

[...] Still getting kicked, any other idea?

No unfortunately.

Hi,

try to check:

if is your Steam online
try to change your profile
try delete your profile folder
check if the server to which you want to log has not full capacity - e.g. some servers has reserved spots and you can get a kick even in case 110/120 because some spots are most likely reserved