I can hear everyone in my party but they say I’m not in the party and cannot hear me, on my...

Maybe they're just pulling a bad prank on you ? Or maybe they party muted you by accident ?

Maybe a router Port forwarding or NAT issue?

Have you compared your Xbox software version and the one of your friends? Maybe there are currently problems between different Xbox Insider versions and/or non Xbox Insider versions?!

Hello Minitop!

Sorry about your problem. Please check this guide, hope it helps!

If you can hear others in a party or game but they can't hear you, try these solutions.

Solution 1: Make sure your headset is not muted

Check that the orange LED light next to the mute button is not on.

Solution 2: Power cycle your Xbox One console

For help, see How to restart or power cycle your Xbox One console.

Solution 3: Re-associate your controller with your profile

1. Press the Xbox button  to open the guide.
2. Select System > Settings > Kinect & devices > Devices & accessories.
3. Under Assigned to, choose your gamertag.

Solution 4: Verify the NAT type for your network

Network Address Translation (NAT) lets you hide your IP address from devices that are not on your network. For more info about NAT, see the "Current network status" section at Network
settings on Xbox One.

Solution 5: Test your Xbox One Chat Headset

To test the headset, start a party (requires internet connectivity) to test the audio:

1. Sign in to Xbox Live on your Xbox One console.
2. Press the Xbox button  to open the guide.
3. Under Multiplayer, select Start a party. (You don't need to invite anyone for this test.)
4. Make sure your mic is not muted in party chat.

Note You can use the Y button  on your controller to toggle mute on or off.

1. Make sure your headset is not muted and that the volume is turned up.
2. Speak into the microphone. If your headset is working, you’ll see the ring around your gamerpic light up.

If you still can't hear your friends online after you've started a party, but you can hear sound while using in-game chat or another app like Skype, see You
can't switch to party chat on Xbox One.

To test your headset on a Windows 10 PC:

1. Download Skype onto your PC if it’s not already installed.
2. Turn on your controller and ensure your Xbox button  is lit to indicate it’s turned on.
3. Connect your headset to your controller.
4. Select Tools, and then Options. Then, select Audio settings in the General menu to test your microphone and speakers. Make sure you have your Xbox One Chat Headset selected from the dropdown list
   of devices while you’re testing.

Note When you first set up Skype, you'll be prompted to check your sound and video quality.

For more information on testing with Skype, see the Skype article, Troubleshooting issues with
Skype call quality.

Solution 6: Troubleshoot your connection

Check your connectivity by using the Xbox One Multiplayer Game Solution.

Unfortunately, none of these answers fixed this for me. Update though: looks like I can hear everything the other people in my Fortnite party is saying, they just can’t hear me. The weirder thing is, when I squad up with randos, the mic works just fine.
I can hear them and they can hear me. Again, same thing when I’m in an Xbox Live party. The only thing that doesnt work is my mic when I’m in a regular Fortnite party (not in an Xbox Live party).