MS365 Teams Error Tag: 4VLPO

Question

MS365 Teams Error Tag: 4VLPO

Christopher Langley 40

The attached error keeps occurring at random when attempting to access MS Teams mostly on my organization’s team members iOS based devices but we also have some android users reporting the same error popping up. What error is being referenced/what is occurring that kicks the users out and is there a fix for this?

2 answers

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Answer 1

LiweiTian-MSFT 25,935 Microsoft External Staff

Hi @Christopher Langley

Can users who cannot log in to Teams on mobile be able to log in on the Teams desktop client or web client?

If all clients cannot log in, contact your Microsoft 365 administrator to run Teams sign-in diagnostics for the user.

You can also run the Microsoft Remote Connectivity Analyzer diagnostics to help you troubleshoot the issue.

If the issue only occurs on mobile, try uninstalling Teams and reinstalling it, and report the issue in the Microsoft 365 admin center.

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LiweiTian-MSFT 25,935 Reputation points Microsoft External Staff

2024-12-30T09:21:27.3633333+00:00

Hi @Christopher Langley

I am checking the status of this case. Please let us know if you would like further assistance. Meanwhile, if the reply is helpful to you, please try to mark it as an answer to help others who encounter the same issue and read this thread. Thank you for your understanding and patience!
LiweiTian-MSFT 25,935 Reputation points Microsoft External Staff

2025-01-01T07:03:44.6866667+00:00

Hi @Christopher Langley

It has been a while, how is everything going? If you have any update about this issue, please feel free to post back.
Christopher Langley 40 Reputation points

2025-01-08T21:19:22.6033333+00:00

Many of my team members as well as myself are still having this error popping up
Rico Witt 0 Reputation points

2025-01-16T07:19:05.99+00:00

I had a similar case in Teams on iOS devices with the error tag: 4vlpo and error code: -42104

In my case, the teams app Viva Connections was involved even though Viva Engage had not yet been used.

The error no longer occurred in Teams after we activated “O365 Identity Enforcement”.

How enforcing Microsoft 365 identities in Viva Engage works

https://learn.microsoft.com/en-us/viva/engage/configure-your-viva-engage-network/enforce-office-365-identity#how-enforcing-microsoft-365-identities-in-viva-engage-works

Answer 2

Jiayun Zhang 0

Just solved the same issue with the same error code.

Sharing my method here.

You should remove the account cache in Authenticator on your mobile for the related account.

Note that you should remove the cache for ALL APPs instead of Authenticator only.

I guess the error happens if the authorization information(cache) mismatches between two apps.

Because your account is still authorized, but the app thinks you're not on your mobile.

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MS365 Teams Error Tag: 4VLPO

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