How do I go back and forth between two Teams on different domains?

[Jeff Shuey]

How do I go back and forth between two Teams?

I have been added to two different Microsoft Teams on different domains.

First off ... I didn't think this was possible with the Teams Preview. I know this feature is coming (Just like on Slack, Yammer, Jive, etc. you can swap between groups and teams)

But, I have been invited and both Teams from two separate domains. As expected ... I can only join one of them. My question is ... Can I be a part of both Teams? Since I login with the same email alias and password I cannot seem to find a way to switch between teams.

Anyone have any ideas? 

[#2]

As you well said, guest support to Teams is not ready yet so you can only participate on teams created on your corporate tenant. However, it's not clear to me how access to Teams where I have been invited as a Guest is going to work when _I'm logged in the Teams App using my corporate Office 365 account

[#3]

I'm in the same situation. In teams I'm in with clients I'm setting up, the only way I can do it is sign out and sign in with another account I have on the other domain(s)

[#4]

We have found the solution.

We are going to setup Slack. 

Probably not what Microsoft wants to hear, but we need to be productive today. We don't want to keep sending piles and piles of emails around for comms and shared files. 

I heard LOUD and CLEAR from the users in our group. Let's get something that works and hope (hope is the operative word) that Microsoft will make a "Migration Kit for Slack to Teams"

I'll keep testing and working with Teams, but I'll be going to what works until "external users" are added to Teams.

[#5]

We have our interim solution. We are going to Slack. (See my post in this same thread for the details if interested).

[#6]

I did the following Hack - seems like a lot of work but once you understand it - its easy to setup - nice hack I have used from time to time for apps that need their own profile....

1. copied c:\users\xxxxx\appdata\local\microsoft\teams  folder to the path under the Default user's local\Microsoft\...  (where xxxxx is your normal corp user - we'll call it C1 here)
2. created a new local user on the workstation (we'll call it L1 here)
3. Switched to L1 (logged into local account on workstation) to force full profile creation
4. copied .\teams\ folder under L1's appdata structure (but I am not actually using it - just put it there in case)
5. still in L1 - logged into Teams ( I did under \users\default\appdtata\local\teams\current\ folder there is teams.exe) - run it - you could run teams under \L1\appdtata\.... instead - just remember to create a shortcut to it somewhere you can reach the shortcut outside of L1 login
6. Teams.exe will ask you to log in - use the other Corp account you want - that is, C2 in this example
7. LOG OUT OF L1
8. log into C1
9. run Teams normally
10. run teams.exe from the \users\default\...\teams.exe or shortcut you created to \users\L1\appdata\...  BUT SHIFT-RIGHT-CLICK on the .exe or shortcut and chose "run as different user"  - use your L1 account as:  ".\L1"  (note the dot before the slash, that is for local machine)
11. and boom you have TWO TEAMS.EXEs running - one for C1 and C2  - from there you can create a custom shortcut to always prompt for creds etc - or I think you could use RUNAS in a cmd/batch file too...

Hacky, I know - but I have a few customers using Teams and I need to work with them at the same time