New Teams account shows "Unknow user" for other accounts.

Question

New Teams account shows "Unknow user" for other accounts.

Gislane Nascimento 0

Hi.

I am having this issue withe this account that I created yesterday. The people who I text, just receive: "Unknown User (******@invalid.teams.ms) deseja conversar com você" (I am brazilian, that's why the portuguese".

I created other 2 account and they had the same issue. Answering some pre-questions:
I chated only personal accounts.

I tryied to use teams in web and the app.

I deleted all contents inside the Teams folder %appdata%\Microsoft\Teams

Something I would like to add: other users can NOT see my account. When they search my name or e-mail I do not show in the list.

I would like sugestion in how i should proceed.

Thank you!

Greg O 0 Reputation points

2026-04-30T01:15:27.5+00:00

This is an ongoing issue with me as well. I'm trying to Accept a user who has underscores in their email address.

As a test if I remove the underscores I can Accept an invite.

Unfortunately it's a waste of time trying to access Microsoft chat. Perhaps someone can simply help me to provision the guest account or let me know when the bug will be fixed.
Chloe-L 13,140 Reputation points Microsoft External Staff Moderator

2026-04-30T23:11:29.6633333+00:00
Hi Greg O ,

Thank you so much for staying engaged and for your patience. I truly appreciate you taking the time to follow up.

At the moment, Microsoft is actively working on this issue. I’ll be sure to share an update here as soon as an official fix is released.

Regarding contacting Microsoft Support, while Microsoft doesn’t provide a “guest” support option, you can quickly create a temporary account to reach live support. Once signed in, you can follow these steps:

Go to https://support.microsoft.com/contactus

Describe your issue

Scroll down and select Sign in to contact support

Under Products & Services, choose Other

Under Categories, select Windows

Then choose Chat with a support agent to get real-time assistance

Please feel free to keep following this thread for updates and let me know if you have any questions in the meantime. Thank you for your patient while Microsoft is working on a solution.
Greg O 0 Reputation points

2026-05-06T23:11:03.1466667+00:00

I was created a new test account without underscores or any special characters.

Using this account I was able to accept a user request from a similar test account, but not from the user account which has underscores, the request that I want to Accept.

The user refuses to create a new account as a workaround unfortunately.
Chloe-L 13,140 Reputation points Microsoft External Staff Moderator

2026-05-08T00:51:34.7033333+00:00

Hi Greg O,

Thank you so much for taking the time to run that test, and for sharing the results so clearly, it really helps confirm the pattern we've been tracking.

I'm truly sorry for the continued inconvenience this has been causing. Unfortunately, the fix for this is taking a bit longer than initially expected. The engineering team is actively working on it, and the next official update from Microsoft is expected on May 13th. I know that's not the immediate resolution you were hoping for, and I genuinely appreciate your understanding while we wait, please rest assured the issue is being tracked closely.

Thank you again for your patience and for being such a cooperative partner in troubleshooting this. I'll circle back here the moment there's news. If any other questions come up in the meantime, please don't hesitate to reply.

Warm regards,
Greg O 0 Reputation points

2026-05-12T23:40:03.4166667+00:00

Thanks Chloe,

I've seen this before. Not on Teams.

If I'm still having trouble accepting my friend request after the next release would it be possible for Microsoft to provision the account?

I'll let you know if the fix works tomorrow.

Thanks again.
Chloe-L 13,140 Reputation points Microsoft External Staff Moderator

2026-05-13T22:41:30.5966667+00:00

Hi Greg O,

Thank you so much for the update, and for your patience while we wait for the next release to roll out.

Account provisioning for personal Microsoft accounts (Outlook.com / Hotmail / Teams for personal use) is handled automatically on the backend, and unfortunately it isn't something that community moderators or even frontline support agents can trigger manually. It's usually tied to the service-side fix itself, so once the update is fully deployed, things like friend requests and contact sync typically start working again on their own.

That said, please do let me know how it goes after tomorrow's release. If you're still running into the same issue, I'd recommend reaching out directly to Microsoft Support through the link below, so they can take a closer look at your account on their end: https://support.microsoft.com/contactus.They'll have the tools to investigate the account-level status and escalate if needed.

I'm looking forward to your update.
Greg O 0 Reputation points

2026-05-15T16:43:43.1833333+00:00
Hi Chloe,

Unfortunately I haven't seen the fix on my end. I'm trying this on both Win10/Win11 using both a laptop and mobile device.

I've also tried accepting my request using 2 accounts that I've created after logging out/in, clearing the cache or running a repair.

Thanks,

Greg
Chloe-L 13,140 Reputation points Microsoft External Staff Moderator

2026-05-15T23:41:14.7933333+00:00

Hi Greg O,

Thank you so much for taking the time to share such a detailed update, and I truly appreciate the care you've put into troubleshooting this.

I'm sorry the fix hasn't yet made its way through on your end. The resolution is currently being deployed in phases, and the ongoing service degradation on Microsoft's side means it may take a little more time before the fix fully reaches every account and region.

I'd kindly ask for a little more patience while the rollout completes. Once the issue is fully resolved on the backend, things should begin working normally again on your side without any further action needed from you.

I'll continue to keep an eye on this thread, so please feel free to check back anytime — I'll be more than happy to follow up. Thank you again for your understanding and for working through this so patiently.

Warm regards,
Greg O 0 Reputation points

2026-05-16T00:48:00.4066667+00:00

Thanks Chloe,

I really appreciate your feedback, help, and technical expertise as well.

You instill a sense of confidence which unfortunately is generally lacking in other companies I've recently dealt with.

Thanks so much. You're a pleasure to work with.

Greg

3 answers

Your answer

Greg O 0 Reputation points

2026-04-30T01:15:27.5+00:00

This is an ongoing issue with me as well. I'm trying to Accept a user who has underscores in their email address.

As a test if I remove the underscores I can Accept an invite.

Unfortunately it's a waste of time trying to access Microsoft chat. Perhaps someone can simply help me to provision the guest account or let me know when the bug will be fixed.
Chloe-L 13,140 Reputation points Microsoft External Staff Moderator

2026-04-30T23:11:29.6633333+00:00

Hi Greg O ,

Thank you so much for staying engaged and for your patience. I truly appreciate you taking the time to follow up.

At the moment, Microsoft is actively working on this issue. I’ll be sure to share an update here as soon as an official fix is released.

Regarding contacting Microsoft Support, while Microsoft doesn’t provide a “guest” support option, you can quickly create a temporary account to reach live support. Once signed in, you can follow these steps:

Go to https://support.microsoft.com/contactus

Describe your issue

Scroll down and select Sign in to contact support

Under Products & Services, choose Other

Under Categories, select Windows

Then choose Chat with a support agent to get real-time assistance

Please feel free to keep following this thread for updates and let me know if you have any questions in the meantime. Thank you for your patient while Microsoft is working on a solution.
Greg O 0 Reputation points

2026-05-06T23:11:03.1466667+00:00

I was created a new test account without underscores or any special characters.

Using this account I was able to accept a user request from a similar test account, but not from the user account which has underscores, the request that I want to Accept.

The user refuses to create a new account as a workaround unfortunately.
Chloe-L 13,140 Reputation points Microsoft External Staff Moderator

2026-05-08T00:51:34.7033333+00:00

Hi Greg O,

Thank you so much for taking the time to run that test, and for sharing the results so clearly, it really helps confirm the pattern we've been tracking.

I'm truly sorry for the continued inconvenience this has been causing. Unfortunately, the fix for this is taking a bit longer than initially expected. The engineering team is actively working on it, and the next official update from Microsoft is expected on May 13th. I know that's not the immediate resolution you were hoping for, and I genuinely appreciate your understanding while we wait, please rest assured the issue is being tracked closely.

Thank you again for your patience and for being such a cooperative partner in troubleshooting this. I'll circle back here the moment there's news. If any other questions come up in the meantime, please don't hesitate to reply.

Warm regards,
Greg O 0 Reputation points

2026-05-12T23:40:03.4166667+00:00

Thanks Chloe,

I've seen this before. Not on Teams.

If I'm still having trouble accepting my friend request after the next release would it be possible for Microsoft to provision the account?

I'll let you know if the fix works tomorrow.

Thanks again.
Chloe-L 13,140 Reputation points Microsoft External Staff Moderator

2026-05-13T22:41:30.5966667+00:00

Hi Greg O,

Thank you so much for the update, and for your patience while we wait for the next release to roll out.

Account provisioning for personal Microsoft accounts (Outlook.com / Hotmail / Teams for personal use) is handled automatically on the backend, and unfortunately it isn't something that community moderators or even frontline support agents can trigger manually. It's usually tied to the service-side fix itself, so once the update is fully deployed, things like friend requests and contact sync typically start working again on their own.

That said, please do let me know how it goes after tomorrow's release. If you're still running into the same issue, I'd recommend reaching out directly to Microsoft Support through the link below, so they can take a closer look at your account on their end: https://support.microsoft.com/contactus.They'll have the tools to investigate the account-level status and escalate if needed.

I'm looking forward to your update.
Greg O 0 Reputation points

2026-05-15T16:43:43.1833333+00:00

Hi Chloe,

Unfortunately I haven't seen the fix on my end. I'm trying this on both Win10/Win11 using both a laptop and mobile device.

I've also tried accepting my request using 2 accounts that I've created after logging out/in, clearing the cache or running a repair.

Thanks,

Greg
Chloe-L 13,140 Reputation points Microsoft External Staff Moderator

2026-05-15T23:41:14.7933333+00:00

Hi Greg O,

Thank you so much for taking the time to share such a detailed update, and I truly appreciate the care you've put into troubleshooting this.

I'm sorry the fix hasn't yet made its way through on your end. The resolution is currently being deployed in phases, and the ongoing service degradation on Microsoft's side means it may take a little more time before the fix fully reaches every account and region.

I'd kindly ask for a little more patience while the rollout completes. Once the issue is fully resolved on the backend, things should begin working normally again on your side without any further action needed from you.

I'll continue to keep an eye on this thread, so please feel free to check back anytime — I'll be more than happy to follow up. Thank you again for your understanding and for working through this so patiently.

Warm regards,
Greg O 0 Reputation points

2026-05-16T00:48:00.4066667+00:00

Thanks Chloe,

I really appreciate your feedback, help, and technical expertise as well.

You instill a sense of confidence which unfortunately is generally lacking in other companies I've recently dealt with.

Thanks so much. You're a pleasure to work with.

Greg

Answer 1

Ruwim.B 6,225 Volunteer Moderator

This is a server-side bug, and waiting longer will not help.

https://learn.microsoft.com/en-us/answers/questions/5864466/user-verification?orderby=oldest&page=1&translated=false#answers

0 comments

Answer 2

Ruwim.B 6,225 Volunteer Moderator

The fix for the "Unknown user" issue takes more time than expected.

https://status.cloud.microsoft/m365

User's image

0 comments

Answer 3

Hello Gislane Nascimento,

This behavior is related to Teams identity provisioning for newly created personal accounts. When an account is very new, it can temporarily appear as “Unknown User (****@invalid.teams.ms)”**, and other users may not be able to find it yet.

This usually resolves automatically within 24–72 hours while Microsoft’s backend finishes syncing the account profile.

If the issue is still present after 48 hours, please try a clean reinstall of Teams:

Sign out of Teams
Uninstall Teams
Delete Teams cache folders (New or Classic, depending on your version)
Restart your computer
Reinstall Teams and sign back in
Open your profile and make sure your display name and profile photo are set

If the account is not new or the issue continues beyond 72 hours, there is very little that can be done on the client side. At that point, the issue likely requires a backend review by Microsoft support, as it involves identity provisioning on the server.

I recommend reaching out to Teams live support directly so they can look into the identity provisioning and profile mapping on the server side for your accounts:

Go to OneCustomer | Chat Support, fill in your details and describe your issue, and select submit

A support agent will be able to verify whether your Teams chat identity provisioning is fully completed or stuck and take corrective action from the backend if needed.

I hope this helps clarify what might have transpired — please let me know when the accounts were created and how it goes after the waiting period. I'm happy to assist further!

Best regards

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Chloe-L 13,140 Reputation points Microsoft External Staff Moderator

2026-04-18T23:10:06.46+00:00

Hello Gislane Nascimento,

Good day to you! I'm just checking in to see if the solution we provided has resolved your issue.

Please don't hesitate to reach out if you require any further assistance.

Warm regards,
Gislane Nascimento 0 Reputation points

2026-04-20T12:10:01.99+00:00

Unfortunately my problem has not been solved. I waited the 72 hours, and my account still follows the error.

I tried the teams reinstall and different devices/internet connection.
The error stil happen. I tried to contact microsoft teams support and was told to ask a question in the comunity, as I did.

Waiting for solutions.
Chloe-L 13,140 Reputation points Microsoft External Staff Moderator

2026-04-22T00:46:47.7333333+00:00

Hello Gislane Nascimento,

I'm really sorry to hear the issue persists, especially after waiting the full 72 hours and trying multiple troubleshooting steps including reinstalling Teams and switching devices and connections.

Currently there is an ongoing maintenance issue impacting user caching mechanisms, and an update is expected to be completed by the end of this week. This may very well be connected to what you're experiencing.

You can follow this thread for new updates: Unknown user (invalid.teams.ms)

In the meantime, there's no need to repeat the troubleshooting steps you've already tried. Once the maintenance update rolls out, I'd appreciate it if you could check again and let me know whether the issue is resolved.

Warm regards,

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New Teams account shows "Unknow user" for other accounts.

3 answers

Your answer