Cant join meetings or sign into zoom via SSO Error 3256000 | Community
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Explorer
November 15, 2023
Solved

Cant join meetings or sign into zoom via SSO Error 3256000

  • November 15, 2023
  • 7 replies
  • 4 views

I have a user who is having trouble connecting to zoom, but only on their home network. Normally I would suggest troubleshooting the network, but zoom is working on all other devices on the network. So here is their hardware info:

Macbook Pro 14-inch 2021

M1 Pro

Sonoma 14.0

Zoom Client 5.16.2

Chrome 119.0.6045.124

 

Zoom network tool came back green on all tests.

 

The user can't reach our zoom tenant in chrome, receiving "This site can't be reached" "The connection was reset" This means they can't sign into the zoom app at all. Using NSLOOKUP and PING for our tenant come back with good results. Using safari allows them to get slightly farther to the "launch in zoom" window which does nothing when the link opens asking to allow.

 

Finally opening the meeting without signing in and joining as a guest gives this error message "an unknown error occurred Error Code: 3256000" which comes up with nothing on google or this forum besides one other post in Japanese from a user with what seems a similar issue on an M2 Mac on Sonoma 14.1.1

 

Any other mac users out there experiencing this?

Best answer by savelleanthony

Shout out to zoom tier 2 for finding this weird fix. You need to go into the hardware settings for your wifi adapter and change the MTU setting. Not sure what MTU is but it works.

7 replies

Community Manager
November 16, 2023

Hi @savelleanthony welcome to the community! 

 

I saw the other discussion, but I don't see any recent or past tickets related to this specific error code to provide you with additional troubleshooting steps. Would you mind creating a ticket with our Zoom Technical Support team so that we can properly investigate this internally for you and escalate it further if necessary?

Newcomer
November 28, 2023

Did you find any solution? I am facing similar problem on Android mobile. Thanks!

Newcomer
November 24, 2023

I have exactly the same problem but macos with intel

Newcomer
December 1, 2023

I'm having the exact same issue. If I keep trying it eventually works, but it's frustrating to not have this working reliably.

Newcomer
December 4, 2023

What is everyone's ISP if that could be causing this? I'm on CenturyLink/Quantum

Newcomer
December 4, 2023

Century Link

savelleanthonyAuthorAnswer
Explorer
December 5, 2023

Shout out to zoom tier 2 for finding this weird fix. You need to go into the hardware settings for your wifi adapter and change the MTU setting. Not sure what MTU is but it works.

Newcomer
December 5, 2023

Wow, that worked. Thanks so much! 

No idea what MTU is. This is why I'm not in networking. 

Newcomer
January 24, 2024

To append to this because I just had the same issue:

 

The proposed fix worked, however I also found this:

 

https://github.com/docker/for-mac/issues/7043

 

I did have Docker running so I turned it off, reverted the changes, and presto Zoom was working again.

 

(Putting this here because this help page came up first when I was searching for the exact error code.)

 

Newcomer
January 25, 2024

Thank you for this!

 

I also use Docker and am on CenturyLink. Glad I understand now.

Newcomer
April 2, 2024

SUPER GRACIAS! FUNCIONÓ!