I have an account in tenant ptABC : employee.name.1@ptABC.com. I become a member (not a guest) in tenant ptDEF using ExternalAzureAD with UPN : employee.name.1_ptABC.com#EXT#@ptDEF.com (picture 1).
I want to Sign In to Copilot Studio tenant ptDEF using employee.name.1@ptABC.com.
(1) I have selected "Sign-in options" (picture 2).
(2) I have selected "Sign in to an organization" (picture 3).
(3) I have filled in "Find your organization" with ptDEF.com (picture 4).
(4) I have filled in "Sign in" with "employee.name.1@ptABC.com" (picture 5) and the URL already changed to "https://login.microsoftonline.com/ptDEF.com/oauth2/v2.0/authorize?client_id=96ff4394-9197-43aa-b393-6a41652e21f8&scope=openid+profile+offline_access&redirect_uri=https%3a%2f%2fcopilotstudio.microsoft.com%2fauth&client-request-id=<...>&response_mode=fragment&response_type=code&x-client-SKU=msal.js.browser&x-client-VER=3.27.0&client_info=1&code_challenge=<...>&code_challenge_method=S256&nonce=<...>&state=<...>&sso_reload=true&allowbacktocommon=True".
(5) I have entered my password correctly and approved my sign in request in my MFA using tenant ptDEF with UPN : employee.name.1_ptABC.com#EXT#@ptDEF.com.
(6) But there is an error "Something went wrong" with the URL "https://copilotstudio.microsoft.com/environments/Default-<Directory ID of tenant ptABC>/home".
(7) I try to copy "https://copilotstudio.microsoft.com/environments/Default-<Directory ID of tenant ptDEF>/home" but it returns an error "Looks like that link is broken, make sure you have the right one and try again".
(8) There is no switch directory option like in azure (picture 6) and powerapps (picture 7) or switch tenant like in microsoft fabric (picture 8).
(9) employee.name.1@ptABC.com already has Basic User security roles and Environment Maker security roles in Default Environment.
(10) Tenant ptDEF already has a copilot studio and copilot studio user license, because I can sign in with employee.name.2@ptDEF.com successfully.
How to solve this?
P.s. : ptABC, ptDEF, employee.name.1 are just dummy data.