Once you created your trial instance without office/work email and need to add your teammates in that instance then please follow below steps.
First login in your office365 which auto created at the time of you created Dynamics Trial.
Browse https://www.office.com/ and click on Admin center from left side home navigation drawer menu.
To create new user now click on "Active Users" under Users.
Here you can see your default user, now click on "Add a user" button to add new user in that tenant.
Now add new user, give username under that domain/tenant.
Now assign Product License to that new user.
Assign Roles also to that new user, give global admin access if you want otherwise leave it.
Once Finish this process and if you try to login in your trial CRM then error will come that " You are not a member of this organization"
To Solve this issue you have to follow below steps.
Once again browse https://trials.dynamics.com/ and select Sales App, this time give work email and phone number, in work email give that new user email id.
Follow next screen process, Sign in by that new user, click on OK got it button.
Now click on "Join an Existing organization" checkbox and click on Join button.
After Join below screen will come, select App and Continue.
Wait for 5-10 mins and then refresh and try to login in CRM trial with new user.
Original Post on My DynamicPower101 Blog
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