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Is Coexistence a switch or a one way migration?

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Frequent Contributor

Hi,

 

I'm an IT Pro. My environment has just a few users, but I use a Skype for Business Desk Phone and thus have a Office 365 calling plan.

 

Currently I use Microsoft Teams in Islands Mode. I can use Microsoft Teams as well as Skype for Business, but the latter only to view the presence of a few external clients. I (almost) never communicate with them by Skype for Business.

 

I want to test what happens when I switch to Teams Only, but I'm afraid I cannot switch back when I do miss some functionality. So, is it a switch or a one way migration after I switch. Will I be able to switch back to Islands Mode?

 

Bonus Question: Can I add external Skype for Business / teams users to my contact list in Microsoft Teams and see their presence? 

6 Replies
Solution

Hi,

 

Yes you can switch back to Islands mode from TeamsOnly mode. You just change the TCoesistence mode back to Islands in Admin Portal or with Powershell. 
https://docs.microsoft.com/en-us/powershell/module/skype/grant-csteamsupgradepolicy?view=skype-ps

image.png

 

No, you can't add external contacts to your contact list yet but you can search for them, chat with them and call them. Use the new chat button in teams and type their full SIP address (should be the same as their email address). You can continue the chat as long as they are in the History view, when the chat is gone there you have to search for them again.

Just made the switch. Let's see what happens :)

 

Do you know if I can chat with another user in another tenant: a free Teams user? It says "We are unable to set up the conversation because the contact you entered wasn't found." but I know he has a free Teams account with this emailadres.

No federation between Teams Free and Teams or Skype is not possible.

You can also pin the chats and see presence for external chats. The ability to add them to contact lists should be coming at some point in the future.

Once Microsoft decide to notify you that they will upgrade your tenant to Teams the option to switch back to Skype or Islands will go away. Currently you could still call support and have them re-enable Skype but they may ask a lot of question.

So the pin option is to keep the chat and see presence. I only have to chat to my clients once to pin them. Seems like an acceptable workaround. :)

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