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nitishkanann23's avatar
nitishkanann23
Copper Contributor
Aug 27, 2020
Solved

MS Teams External Chat not working

Hi,   I have been chatting with external users (clients) of different domains from my organizational account. Suddenly, this has stopped working. Instead of an 'External' tag next to their name, No...
External Chat
Guest Access
microsoft teams
  • MastBob's avatar
    MastBob
    Jun 30, 2021

    yes in my post above I posted a command to clear all those locators. I think it was this one :

    Get-ADUser -Filter {msRTCSIP-DeploymentLocator -like "SRV*"} |
    Set-ADUser -Clear msRTCSIP-DeploymentLocator

    http://terenceluk.blogspot.com/2020/11/powershell-script-for-clearing-msrtcsip.html

    you can always try 1 account with the AD attribute editor and see if it works before dooing the command on all users. ( don't forget to sync to the cloud)

    Dooing a logout + login cycle for teams on the users computer might be required.

     

    If not you can make a case with O365 support but I solved it myself before they had any decent info

     

    no idea why this happens but in my case the Skype on prem server crashed before we could decommission properly.

MastBob's avatar
MastBob
Copper Contributor
Feb 22, 2021

Any other people with suggestions?

Jef Vleugels's avatar
Jef Vleugels
Brass Contributor
Apr 23, 2021

MastBob did you found a solution? Same problem here...

  • MastBob's avatar
    MastBob
    Copper Contributor
    Jun 30, 2021
    Did you get it fixed Jef ?
    • Jef Vleugels's avatar
      Jef Vleugels
      Brass Contributor
      Jun 30, 2021
      Not instantly, but your information helped making the migration plan from a complex hybrid S4B environment with resource forest and appliance to Teams Only with direct routing. We could not adjust DNS nor empty the msRTCSIP-DeploymentLocator for users who were still using the old environment. Migration is almost finished now.
  • MastBob's avatar
    MastBob
    Copper Contributor
    Apr 26, 2021

    Jef Vleugels 

     

    Hello Jef,

    I did solve it. It has been a wile so I don't know exacly how I did it but here are some left over notes. I would create a MS case if you are not sure about the following commands.

     

     

    This commands to connect to PS :

    Import-Module SkypeOnlineConnector
    $session = New-CsOnlineSession -Verbose -OverrideAdminDomain ******.onmicrosoft.com
    Import-PSSession $session –AllowClobber

     

    Command to disable lync on premise shared sip space

     

    Set-CsTenantFederationConfiguration -SharedSipAddressSpace $false

     

    also changed the following DNS

    lyncdiscover.yourdomain.com to webdir.online.lync.com

     

    I do remember setting some user settings from hybrid to online online but not sure if this command did anything :

     

    Get-ADUser -Filter {msRTCSIP-DeploymentLocator -like "SRV*"} |
    Set-ADUser -Clear msRTCSIP-DeploymentLocator

    • Lucas_Reis's avatar
      Lucas_Reis
      Copper Contributor
      Jun 28, 2021
      Jef Vleugels

      The problem with my client is that only a few users have the error.
      • Jef Vleugels's avatar
        Jef Vleugels
        Brass Contributor
        Jun 29, 2021

        Lucas_Reis can you elaborate a little further? S4B? Hybrid? Teams migration? 

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