Hi,
I have exactly the same problem.
Did you solved it ?
I have a a guest User in my AAD, I have assign a business central License ( Essential ),
The login sign in with success with the GuestUsername@Guestuserdomaine.com
But he have to go to the URL
businesscentral.dynamics.com/.../
AND NOT
businesscentral.dynamics.com/ => his tenant will be used
the GuestUser already have a M365 tenant on his own domain.
But, will have Business Central on my domain and make Full user action ( so the Business Central license paid for him ).
Have to have his Outlook configured with my Business Central Instance, but when trying to configure with the assisted setup the Outlook Add-In, don't work, neither with his work mail
GuestUsername@Guestuserdomaine.com : error => Outlook Add in well installed, but trying to connect to Business Central Tenant of Guestuserdomaine.com instead of mydomain.com, so connection error.
, nor with GuestUsername@Guestuserdomaine.com#EXT#mydomain.com : error => Username or password error.
the mail GuestUsername@Guestuserdomaine.com#EXT#mydomain.com is used by default in the Assisted setup, I have changed it to GuestUsername@Guestuserdomaine.com.
I have the same trouble with Power Automate, Power Bi, etc... to link the guest user in my tenant on his Power Plateform connection.
for example : his Power automate license on his tenant, and get data from my BC tenant through the guest user configuration.
AS well, for the Mobile App, I tried to create a link as described here
docs.microsoft.com/.../devenv-link-to-mobile-app:
ms-businesscentral://businesscentral.dynamics.com/[mytenant ID]/production_env_name
On a Samsung ( Android ) Cell phone. And the link is not linked to the app, nothing happen when opening with edge or chrome or Mozilla on the cellphone. Just starting a google search.....
But work well on a W10 laptop with BC app installed
It's a global problem :
Use you O365 tool ( Outlook, POWER BI,Power automate, etc...), but with a BC not in your tenant, on a tenant you've been invited and assigned Full User License.
