Hello,
- SMTP and UPN are different. User has UPN ******@doman.eu and SMTP is ******@domain.com. When users are being invited to different organization this works fine except for one organization. I have tried to recreate the issue with a test tenant and I'm not able to do so.
- Azure AD part is fine
- In our tenant there are no special settings that would prevent guest access to work.
- That is an option, but I would like to know why it works in 99,9% of the cases and it doesn't work in 0,1%.
Any hint idea where to look and what to change configuration vise on my test tenant to replicate the issue will be more then welcome.