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Robert K's avatar
Robert K
Brass Contributor
Sep 30, 2020
Solved

Unable to switch to Teams-only mode

I tried to switch from Island mode to Teams-only mode. But the admin center is not accepting the setting. Why?      The screenshot shows one of my demo tenants. But I have the exact same iss...
microsoft teams
Michael Mardahl's avatar
Michael Mardahl
Brass Contributor
Oct 20, 2020

Robert K 

You need to make sure you donøt have any wildcard DNS records, as the Teams upgrade experience will try and do a DNS lookup for the SfB on-prem Autodiscover records.

If you can't remove the wildcard A or CNAME records, you will need to enter the Office 365 admin center and enable Skype For business services for your domain,s and get the DNS records for Skype for Business Online setup in DNS so the Teams upgrade experience can then determine that you are not using Skype for Business on-prem.

If you ask me, they should add a -Force switch to the PowerShell command 😉

  • Martin_Schellin's avatar
    Martin_Schellin
    Copper Contributor
    Dec 08, 2020
    Hey Michael,
    where can i enable Skype For business services for our domain's?
    We have a primary forward lookup zone where all Skype DNS Entries setting up correctly. While we were trying to switch coexistence mode to teams only, we get an error that there is an on-premise deployment of Skype for Business detected in 1 or more of it sip domains, *DOMAIN*. Our users do have a UPN with a different domain. Do i have to create a secondary zone and add the skype DNS entries as well?
    Best regards Martin
    • adam deltinger's avatar
      adam deltinger
      MVP
      Dec 08, 2020
      you set this on your external dns. and for the domain you are using..

      Check domains in admin portal..from there you can see what records you need
      • Martin_Schellin's avatar
        Martin_Schellin
        Copper Contributor
        Dec 08, 2020

        Hey Adam,
        thanks for response. I can see, that we have one domain with missing DNS Seetings on united-domains (cname + SRV), i think once we added the required entries, we will be be able to do the Teams only Upgrade.
        Thanks and best regards

  • kevinlause's avatar
    kevinlause
    Copper Contributor
    Oct 20, 2020

    Michael MardahlAre you saying to remove the lyncdiscover and sip cnames? We have been using skype online only and the DNS entries look correct for our domain but we are using a wild card and are seeing this error. I don't want to remove the DNS entries if that isn't the fix. 

    • KawslabMSFT's avatar
      KawslabMSFT
      Copper Contributor
      Oct 23, 2020

      kevinlause You don't need to remove the Wildcard. Just make sure, that the correct SIP-records are set, from the templates in the admin-panel in 365.

       

      I had the same issue, where we couldn't switch to 'Teams Only':

      - New tenant

      - No prior SfB setup, hence no SIP-records in DNS.

      - Wildcard on primary domain.

       

      I added the SIP-records and I was then able to upgrade through the TAC.

      • Martin_Schellin's avatar
        Martin_Schellin
        Copper Contributor
        Dec 08, 2020
        Hey KawslabMSFT,
        where can i find the Template in the 365 admin-portal?
        Best regards

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